WEC Energy (WEC) 10-K 2005 FY Annual report

Exhibit 31.2

Certification Pursuant to
Rule 13a-14(a) or 15d-14(a),
as Adopted Pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002

                          I, Allen L. Leverett, certify that:

1.   I have reviewed this annual report on Form 10-K of Wisconsin Energy Corporation;

2.   Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to
        state a material fact necessary to make the statements made, in light of the circumstances under which
        such statements were made, not misleading with respect to the period covered by this report;

3.   Based on my knowledge, the financial statements, and other financial information included in this
        report, fairly present in all material respects the financial condition, results of operations and cash
        flows of the registrant as of, and for, the periods presented in this report;

4.   The registrant's other certifying officer(s) and I are responsible for establishing and maintaining
        disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and
        internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))
        for the registrant and have:

a)      Designed such disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure that material information
relating to the registrant, including its consolidated subsidiaries, is made known to us by
others within those entities, particularly during the period in which this report is being prepared;

(b)      Designed such internal control over financial reporting, or caused such internal control over
financial reporting to be designed under our supervision, to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements
for external purposes in accordance with generally accepted accounting principles;

c)      Evaluated the effectiveness of the registrant's disclosure controls and procedures and
presented in this report our conclusions about the effectiveness of the disclosure controls and
procedures, as of the end of the period covered by this report based on such evaluation; and

d)      Disclosed in this report any change in the registrant's internal control over financial reporting
that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal
quarter in the case of an annual report) that has materially affected, or is reasonably likely
to materially affect, the registrant's internal control over financial reporting; and

5.   The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of
        internal control over financial reporting, to the registrant's auditors and the audit committee of the
        registrant's board of directors (or persons performing the equivalent functions):

a)      All significant deficiencies and material weaknesses in the design or operation of internal
control over financial reporting which are reasonably likely to adversely affect the
registrant's ability to record, process, summarize and report financial information; and

b)        Any fraud, whether or not material, that involves management or other employees who have
a significant role in the registrant's internal control over financial reporting.

                         Date:          March 2, 2006

                                            /s/ALLEN L. LEVERETT                  
                                            Allen L. Leverett
                                            Chief Financial Officer