Thomas & Betts (TNB) 11-K Annual report of employee stock purchases

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 11-K

(Mark One)
þ	ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the fiscal year ended December 31, 2005
or
o	TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from            to

Commission file number: 1-4682

     A.  Full title of the plan and the address of the plan, if different from that of the issuer named below:

Thomas & Betts Corporation

Employees’ Investment Plan

     B.  Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:

Thomas & Betts Corporation

8155 T&B Boulevard

Memphis, Tennessee 38125

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

TABLE OF CONTENTS

		Page No.
Report of Independent Registered Public Accounting Firm			3
Financial Statements:
	Statements of Net Assets Available for Benefits — December 31, 2005 and 2004		4
	Statements of Changes in Net Assets Available for Benefits — Years Ended December 31, 2005, 2004 and 2003		5
	Notes to Financial Statements		6
Schedule 1 — Schedule of Assets (held at end of year) — December 31, 2005			16
Signature			17
Exhibits:
	Index		E-1
	Exhibit 23		E-2

2

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Retirement Plans Committee of Thomas & Betts Corporation

Thomas & Betts Corporation Employees’ Investment Plan:

We have audited the accompanying statements of net assets available for benefits of Thomas & Betts Corporation Employees’ Investment Plan as of December 31, 2005 and 2004, the related statements of changes in net assets available for benefits for each of the years in the three-year period ended December 31, 2005, and the schedule of assets (held at end of year). These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of Thomas & Betts Corporation Employees’ Investment Plan as of December 31, 2005 and 2004, and the changes in net assets available for benefits for each of the years in the three-year period ended December 31, 2005, in conformity with U.S. generally accepted accounting principles.

Our audits were performed for the purpose of forming an opinion on the basic financial statements taken as a whole. The information included in Schedule 1 is presented for purposes of additional analysis and is not a required part of the basic financial statements but is supplementary information required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. The information in Schedule 1 is the responsibility of the Plan’s management and has been subjected to the auditing procedures applied in the audit of the basic 2005 financial statements and, in our opinion, is fairly stated in all material respects in relation to the basic 2005 financial statements taken as a whole.

KPMG LLP

Memphis, Tennessee

June 19, 2006

3

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS

				December 31,
				2005		2004
PLAN ASSETS
Investments at fair value:
	Mutual Funds			$	115,332,820	$	107,806,662
	Thomas & Betts Corporation Stock Fund				15,230,627		11,484,111
		Total investments at fair value			130,563,447		119,290,773
Employee Loan Fund (at cost, which approximates fair value)					4,154,590		4,051,238
Vanguard Retirement Savings Trust (at contract value)					25,206,474		23,986,711
		Total investments			159,924,511		147,328,722
Receivables from Thomas & Betts Corporation:
	Employee contributions				38,132		35,691
	Employer contributions				19,644		18,694
		Total receivables			57,776		54,385
			Total assets		159,982,287		147,383,107
LIABILITIES — Accounts payable					—		22,942
NET ASSETS AVAILABLE FOR BENEFITS				$	159,982,287	$	147,360,165

See accompanying notes to financial statements.

4

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS

				Years Ended December 31,
				2005			2004			2003
Investment income (loss):
	Interest and dividends			$	5,126,328		$	4,132,175		$	3,187,793
	Net appreciation (depreciation) in fair value of investments:
			Net realized gain (loss) on sales of investments		934,118			(489,338	)		(3,556,279	)
			Unrealized appreciation (depreciation) of investments		7,073,952			11,547,788			23,523,817
					8,008,070			11,058,450			19,967,538
		Total investment income (loss)			13,134,398			15,190,625			23,155,331
Contributions:
	Employees				8,034,261			7,763,108			7,338,537
	Employer				2,454,534			2,819,069			1,586,383
		Total contributions			10,488,795			10,582,177			8,924,920
Administrative expenses					(108,578	)		(113,539	)		(109,513	)
Withdrawals					(10,892,493	)		(14,816,980	)		(15,202,406	)
Net increase (decrease)					12,622,122			10,842,283			16,768,332
Net assets available for benefits:
	Beginning of year				147,360,165			136,517,882			119,749,550
	End of year			$	159,982,287		$	147,360,165		$	136,517,882

See accompanying notes to financial statements.

5

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS

Note 1:  Plan Description

General

      The Board of Directors of Thomas & Betts Corporation (the “Corporation”) adopted the Thomas & Betts Corporation Employees’ Investment Plan (the “Plan”) on April 4, 1984, effective July 1, 1984. The participants in the Plan are eligible employees of the Corporation and its participating subsidiaries. Eligibility, participation, enrollment, participant and employer contributions, vesting, forfeitures, loans, withdrawals, distributions, and other Plan provisions are described in detail in the Plan document.

Employee and Employer Contributions

      An eligible covered employee may participate in the Plan by electing to authorize before-tax contributions in an amount equal to any whole percentage of his or her compensation up to 30% each payroll period. In 2005, 2004 and 2003, the Corporation matched 75% of the amount of a participant’s before-tax contributions up to 3% of compensation and 50% of the amount of a participant’s before-tax contributions over 3% and up to 5% of compensation, subject to regulatory limitations.

      An eligible covered employee who has attained age 50 before the end of a Plan year may also elect to make before-tax catch-up contributions. The Corporation does not make any matching contributions with respect to before-tax contributions in excess of 5% of compensation for a payroll period or any catch-up contributions.

Investment Funds

      Assets of the Plan are held in the following funds. The following descriptions were provided by the respective investment managers.

      (1) Thomas & Betts Corporation Stock Fund — invests in common stock of the Corporation and the Vanguard Federal Money Market Fund.

      (2) Vanguard Wellington Fund — balanced fund that invests in common stocks (with emphasis on “blue chip” stocks), corporate bonds, U.S. Government securities and preferred stock.

      (3) Vanguard 500 Index Fund — invests in the common stock of major corporations, with the view to achieve a return on investments equal to the Standard & Poor’s 500 index.

      (4) Vanguard U.S. Growth Fund — invests in high-quality, established growth stocks of companies based in the United States.

      (5) Vanguard Windsor II Fund — invests in undervalued, income-producing stocks, characterized by above-average income yields and below-average price/earnings ratios relative to the stock market.

      (6) Vanguard Total Bond Market Index Fund — seeks to provide a high level of interest income by attempting to match the performance of the unmanaged Lehman

6

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

Brothers Aggregate Bond Index, which is a widely recognized measure of the entire taxable U.S. bond market.

      (7) Vanguard International Growth Fund — invests in the stocks of companies located outside the United States.

      (8) Vanguard Extended Market Index Fund — seeks to provide long-term growth of capital by attempting to match the performance of the Wilshire 4500 Equity Index, an unmanaged index made up mostly of mid- and small-capitalization companies.

      (9) Vanguard Capital Opportunity Fund — aggressive growth stock mutual fund that invests mainly in U.S. stocks, with an emphasis on companies that have prospects for rapid earnings growth.

      (10) Vanguard PRIMECAP Fund — seeks long-term capital appreciation, using a fundamental approach to invest in growth-oriented companies at attractive valuation levels. The fund has the flexibility to invest across all market capitalizations and industry sectors, although holdings are generally large- and mid-capitalization stocks.

      (11) Vanguard Explorer Fund — small-company growth stock mutual fund that invests in a diversified group of small-company stocks with prospects for above-average growth.

      (12) Vanguard LifeStrategy Growth Fund — invests in four other Vanguard mutual funds according to a fixed formula that typically results in an allocation of about 80% of assets to common stocks and 20% to bonds.

      (13) Vanguard LifeStrategy Moderate Growth Fund — invests in four other Vanguard mutual funds according to a fixed formula that typically results in an allocation of about 60% of assets to common stocks and 40% to bonds.

      (14) Vanguard LifeStrategy Income Fund — invests in four other Vanguard mutual funds according to a fixed formula that typically results in an allocation of about 20% of assets to common stocks and 80% to bonds.

      (15) Vanguard LifeStrategy Conservative Growth Fund — invests in five other Vanguard mutual funds according to a fixed formula that typically results in an allocation of about 40% of assets to common stock and 60% to bonds.

      (16) Vanguard Growth Index Fund — seeks to track the investment performance of the Morgan Stanley Capital International US Prime Market Growth Index, an unmanaged benchmark representing large U.S. firms, primarily large-capitalization stocks.

      (17) Vanguard Retirement Savings Trust — collective trust fund that invests in investment contracts issued by insurance companies and commercial banks, and similar types of fixed principal investments.

7

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

      Each participating employee may direct before-tax contributions in any one or more of the above funds. The Corporation’s contribution is allocated among the funds in the same proportion as the employee’s before-tax contribution. Each employee may change the amount and allocation of his or her contribution or reallocate existing balances among funds by notifying The Vanguard Group on any business day.

Participant Loans

      The Plan permits active participants with vested accrued benefits of at least $2,000 to borrow directly from their account. Participants may borrow a minimum of $1,000, up to a maximum of the lesser of $50,000 or 50% of their vested accrued benefit, less any outstanding loans, for a period of up to 5 years. The interest rate charged is generally one percentage point greater than the prime rate on the first business day of the month in which the loan is granted. This rate does not change for the life of the loan. Loan repayments credited to a particular account of a participant are reinvested in proportion to the participant’s most recent investment directive.

Note 2:  Accounting Policies

Basis of Accounting

      The accompanying financial statements have been prepared on the accrual basis.

Use of Estimates in Preparation of Financial Statements

      The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the Plan administrator to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of changes in net assets during the reporting period. Actual results could differ from those estimates.

Valuation

      The Plan’s investments are stated at fair value except for the Employee Loan fund and the Vanguard Retirement Savings Trust. Shares of registered investment companies are valued at quoted market prices which represent the net asset value of shares held by the Plan at year-end. The Corporation’s stock within the Thomas & Betts Corporation Stock fund is valued at its quoted market price. Employee loans are valued at cost, which approximates fair value. The Vanguard Retirement Savings Trust is valued at contract value as it is fully benefit responsive. Security transactions are recorded on the trade date, and dividend income is recorded on the ex-dividend date. The cost of securities sold is based on the average cost of those securities.

      The Vanguard Group has been designated by the Board of Directors of the Corporation as the Plan trustee.

8

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

Note 3:  Amendments to The Plan

      In 2003, the Corporation amended the Plan to (i) eliminate the stated formula for determining the amount of matching contributions and provide that the amount of matching contributions, if any, to be made will be determined by the Corporation, in its sole discretion, and (ii) change the definition of compensation used for purposes of applying certain Internal Revenue Code limits, in an effort to simplify administration.

      There were no material amendments to the Plan in 2004.

      In 2005, the Corporation amended the Plan to (i) permit participation by certain former employees of Southern Monopole and Utilities Company (effective January 14, 2005), (ii) retain the current mandatory cash-out limit of $5,000 by complying with the automatic rollover rules, (iii) cap the interest rate at 6% for loans taken by a participant prior to commencement of military service, and (iv) define “spouse” with reference to federal law.

9

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

Note 4:  Investments

      The following table presents investments at December 31, 2005 and 2004.

	2005				2004
	Number of				Number of
	shares/units				shares/units
	or principal				or principal
	amount		Fair Value		amount		Fair Value
Investments at fair value as determined by quoted market price:
Thomas & Betts Corporation Stock Fund		1,112,537	$	15,230,627		1,139,297	$	11,484,111
Vanguard Wellington Fund		1,077,081		32,689,415		1,019,501		30,778,745
Vanguard 500 Index Fund		266,054		30,574,973		275,512		30,758,162
Vanguard U.S. Growth Fund		836,731		15,019,327		873,047		14,125,902
Vanguard Windsor II Fund		293,727		9,202,469		252,078		7,746,370
Vanguard Total Bond Market Index Fund		678,879		6,829,520		644,719		6,621,267
Vanguard International Growth Fund		300,106		6,302,234		270,047		5,093,095
Vanguard Extended Market Index Fund		127,016		4,351,577		123,743		3,880,577
Vanguard Capital Opportunity Fund		109,905		3,630,163		99,336		3,056,563
Vanguard PRIMECAP Fund		25,565		1,669,640		23,565		1,468,106
Vanguard Explorer Fund		22,472		1,687,892		19,679		1,467,487
Vanguard LifeStrategy Growth Fund		51,506		1,081,630		43,442		870,573
Vanguard LifeStrategy Moderate Growth Fund		50,813		938,508		50,216		899,362
Vanguard LifeStrategy Income Fund		44,636		602,136		38,507		521,006
Vanguard LifeStrategy Conservative Growth Fund		36,276		561,916		26,174		399,410
Vanguard Growth Index Fund		6,950		191,403		4,545		120,037
Other		—		17		—		—
				130,563,447				119,290,773
Investments at contract value:
Vanguard Retirement Savings Trust		25,206,474		25,206,474		23,986,711		23,986,711
Investments at cost, which approximates fair value:
Employee Loan Fund		4,154,590		4,154,590		4,051,238		4,051,238
Total Investments			$	159,924,511			$	147,328,722

10

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

      A summary of net realized gains/losses on sales of investments for the years ended December 31, 2005, 2004, and 2003 follows:

		Proceeds				Net Realized
		From Sales		Cost		Gain (Loss)
2003
Thomas & Betts Corporation Stock
	Fund	$	2,500,531	$	3,476,023	$	(975,492	)
All other investments			28,398,409		30,979,196		(2,580,787	)
		$	30,898,940	$	34,455,219	$	(3,556,279	)
2004
Thomas & Betts Corporation Stock
	Fund	$	2,401,929	$	2,323,503	$	78,426
All other investments			26,698,085		27,265,849		(567,764	)
		$	29,100,014	$	29,589,352	$	(489,338	)
2005
Thomas & Betts Corporation Stock
	Fund	$	3,142,273	$	2,641,392	$	500,881
All other investments			22,004,171		21,570,934		433,237
		$	25,146,444	$	24,212,326	$	934,118

      A summary of unrealized appreciation (depreciation) of investments for 2005, 2004 and 2003 follows:

		Thomas & Betts
		Common Stock			All Other
		Fund			Investments			Total
Balance at December 31, 2002		$	(4,839,103	)	$	(22,574,592	)	$	(27,413,695	)
	Change in unrealized appreciation (depreciation)		3,473,991			20,049,826			23,523,817
Balance at December 31, 2003		$	(1,365,112	)	$	(2,524,766	)	$	(3,889,878	)
	Change in unrealized appreciation (depreciation)		2,979,863			8,567,925			11,547,788
Balance at December 31, 2004		$	1,614,751		$	6,043,159		$	7,657,910
	Change in unrealized appreciation (depreciation)		3,649,179			3,424,773			7,073,952
Balance at December 31, 2005		$	5,263,930		$	9,467,932		$	14,731,862

11

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

      During the years ended December 31, 2005, 2004 and 2003, the Plan’s investments — including investments bought and sold, as well as held, during the year — appreciated (depreciated), as follows:

	2005			2004			2003
Thomas & Betts Corporation Stock Fund	$	4,150,060		$	3,058,289		$	2,518,586
Vanguard Wellington Fund		157,997			1,379,486			4,277,406
Vanguard 500 Index Fund		875,742			2,503,062			6,335,978
Vanguard U.S. Growth Fund		1,456,157			894,330			3,066,734
Vanguard Windsor II Fund		148,255			1,038,228			1,408,985
Vanguard Total Bond Market Index Fund		(144,154	)		(30,559	)		(56,558	)
Vanguard International Growth Fund		608,386			719,764			1,038,420
Vanguard Extended Market Index Fund		351,379			567,496			863,237
Vanguard Capital Opportunity Fund		248,997			430,103			173,837
Vanguard PRIMECAP Fund		59,027			174,796			90,040
Vanguard Explorer Fund		17,468			171,630			120,657
Vanguard LifeStrategy Growth Fund		49,513			75,705			49,159
Vanguard LifeStrategy Moderate Growth Fund		23,059			48,774			28,818
Vanguard LifeStrategy Income Fund		(679	)		9,206			23,232
Vanguard LifeStrategy Conservative Growth Fund		1,441			14,488			14,947
Vanguard Growth Index Fund		5,422			3,652			14,060
Net appreciation (depreciation) in fair value of investments	$	8,008,070		$	11,058,450		$	19,967,538

12

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

Note 5:  Investment Fund Participation

      As of December 31, 2005, the number of participants in each investment fund was as follows:

	Number of
	Participants
Thomas & Betts Corporation Stock Fund		1,258
Vanguard Wellington Fund		1,624
Vanguard 500 Index Fund		1,736
Vanguard U.S. Growth Fund		1,311
Vanguard Windsor II Fund		722
Vanguard Total Bond Market Index Fund		772
Vanguard International Growth Fund		681
Vanguard Extended Market Index Fund		457
Vanguard Capital Opportunity Fund		244
Vanguard PRIMECAP Fund		169
Vanguard Explorer Fund		205
Vanguard LifeStrategy Growth Fund		139
Vanguard LifeStrategy Moderate Growth Fund		105
Vanguard LifeStrategy Income Fund		102
Vanguard LifeStrategy Conservative Growth Fund		81
Vanguard Growth Index Fund		68
Vanguard Retirement Savings Trust		1,464
Employee Loan Fund		888

      The number of participants in the Plan was less than the sum of participants shown above because many were participating in more than one fund.

Note 6:  Contributions

      The Corporation’s contributions vest at the end of each year starting with the second year of vesting service, at the rate of 25% each year (fully vested after five years). A participant in the Plan whose employment terminates for any reason before his or her death, attainment of age 60, or total and permanent disability is entitled to receive the vested portion of his or her employer contribution account, plus earnings thereon. A participant is entitled to receive 100% of the participant’s own contributions plus earnings thereon.

      In addition, employees of certain entities acquired by the Corporation have a 100% nonforfeitable right to the amounts in their accounts attributable to transferred contributions from the acquired entity’s plan and, in certain cases, to the amount in their employer contribution accounts. Under the provisions of the Plan, amounts forfeited can be restored to a participant if the participant is re-employed within five years of separation. Those forfeited

13

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

amounts are retained as unallocated plan assets until such time as they are not subject to being restored. They are then used to offset Plan Sponsor matching contributions. Forfeitures used to offset Plan Sponsor contributions totaled $1.0 million, $0.5 million and $1.9 million during the plan year ended December 31, 2005, 2004 and 2003, respectively. The Plan held unallocated assets of $0.5 million and $1.3 million at December 31, 2005 and 2004, respectively. Unallocated assets are invested in the Vanguard Retirement Savings Trust and such assets and related earnings, at times, can reduce future contributions by the Corporation.

Note 7:  Termination

      The Board of Directors of the Corporation may terminate the Plan, in whole or in part, or permanently discontinue contributions thereunder for any reason at any time. In the case of such termination or permanent discontinuance of contributions thereunder, the participants become fully vested in their accounts, except to the extent the law or regulations may preclude such vesting in order to prevent discrimination in favor of highly compensated employees.

Note 8:  Income Taxes

      The Internal Revenue Service has issued a determination letter dated April 1, 2003 to the effect that the Plan is a qualified plan under Section 401(a) of the Internal Revenue Code of 1986 and the trust established under the Plan is exempt from income tax under Section 501(c). Since the date of this letter, the Corporation has made amendments to the Plan that in management’s judgment do not impact the Plan’s qualified status. The Plan administrator believes that the Plan is designed and is currently being operated in compliance with the applicable requirements of the Internal Revenue Code.

Note 9:  Investment Contract with Retirement Savings Trust

      The Plan maintains a benefit-responsive investment contract with Vanguard Retirement Savings Trust (Vanguard). Vanguard maintains the contributions in a general account. The account is credited with earnings on the underlying investments and charged for participant withdrawals and administrative expenses. The contract is included in the financial statements at contract value as reported to the Plan by Vanguard, as it is fully benefit responsive. Contract value represents contributions made under the contract, plus earnings, less participant withdrawals and administrative expenses. Participants may ordinarily direct the withdrawal or transfer of all or a portion of their investment at contract value.

      There are no reserves against contract value for credit risk of the contract issuer or otherwise. The average yield and crediting interest rates were approximately 4% for 2005, 2004 and 2003. Interest income is calculated and accrued daily using the daily deposit balance in the respective investment contract at the crediting rate of the contract.

14

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

NOTES TO FINANCIAL STATEMENTS — (Continued)

Note 10: Reconciliation of Financial Statements to Form 5500

      The following is a reconciliation of Liabilities — accounts payable per the financial statements to the Form 5500:

	December 31,
	2004
Accounts payable per the financial statements	$	22,942
Deduct: reclassification for Form 5500 purposes		(22,942	)
Other liabilities per Form 5500	$	—

      The following is a reconciliation of Total investment income (loss) per the financial statements to the Form 5500:

	December 31,
	2005		2004		2003
Total investment income (loss) per the financial statements	$	13,134,398	$	15,190,625	$	23,155,331
Add: reclassification for Form 5500 purposes		154,405		78,726		—
Earnings (loss) on investments per Form 5500	$	13,288,803	$	15,269,351	$	23,155,331

      The following is a reconciliation of Withdrawals per the financial statements to the Form 5500:

	December 31,
	2005		2004		2003
Withdrawals per the financial statements	$	10,892,493	$	14,816,980	$	15,202,406
Add: reclassification for Form 5500 purposes		177,347		55,784		—
Total benefit payments, corrective distributions and deemed distributions per Form 5500	$	11,069,840	$	14,872,764	$	15,202,406

15

Schedule 1

THOMAS & BETTS CORPORATION

EMPLOYEES’ INVESTMENT PLAN

SCHEDULE OF ASSETS (HELD AT END OF YEAR)

December 31, 2005

Identity of Issue			Description		Fair Value
Thomas & Betts Corporation Stock Fund*				1,112,537 units	$	15,230,627
Mutual Funds:
	Vanguard Wellington Fund*			1,077,081 units		32,689,415
	Vanguard 500 Index Fund*			226,054 units		30,574,973
	Vanguard U.S. Growth Fund*			836,731 units		15,019,327
	Vanguard Windsor II Fund*			293,727 units		9,202,469
	Vanguard Total Bond Market Index Fund*			678,879 units		6,829,520
	Vanguard International Growth Fund*			300,106 units		6,302,234
	Vanguard Extended Market Index Fund*			127,016 units		4,351,577
	Vanguard Capital Opportunity Fund*			109,905 units		3,630,163
	Vanguard PRIMECAP Fund*			25,565 units		1,669,640
	Vanguard Explorer Fund*			22,472 units		1,687,892
	Vanguard LifeStrategy Growth Fund*			51,506 units		1,081,630
	Vanguard LifeStrategy Moderate Growth Fund*			50,813 units		938,508
	Vanguard LifeStrategy Income Fund*			44,636 units		602,136
	Vanguard LifeStrategy Conservative Growth Fund*			36,276 units		561,916
	Vanguard Growth Index Fund*			6,950 units		191,403
	Other					17
Total Funds						130,563,447
Guaranteed Investment Contracts — Vanguard Retirement Savings Trust*				25,206,474 units		25,206,474
Loan Fund — Participant loans, maturity dates ranging from January, 2006 to December, 2010, and interest rates ranging from 5.0% to 10.5%*				4,154,590		4,154,590
		Total investments			$	159,924,511

*  Vanguard Fiduciary Trust Company and Thomas & Betts Corporation are parties-in-interest with respect to the Plan.

See accompanying independent auditors’ report.

16

SIGNATURE

      The Plan. Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

Thomas & Betts Corporation Employees’

Investment Plan

By:  /s/ Stanley P. Locke

Stanley P. Locke

Plan Administrator

Date: June 20, 2006

17

INDEX TO EXHIBITS

Exhibit
Number		Description
	23	Consent of Independent Registered Public Accounting Firm

E-1