1 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Alfred R. Glancy III ------------------------------------ ALFRED R. GLANCY III 2 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. William K. McCrackin ------------------------------------ WILLIAM K. MCCRACKIN 3 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Stephen E. Ewing ------------------------------------ STEPHEN E. EWING 4 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Frank M. Hennessey ------------------------------------ FRANK M. HENNESSEY 5 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Thomas H. Jeffs II ------------------------------------ THOMAS H. JEFFS II 6 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Arthur L. Johnson ------------------------------------ ARTHUR L. JOHNSON 7 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Dale A. Johnson ------------------------------------ DALE A. JOHNSON 8 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Helen O. Petrauskas ------------------------------------ HELEN O. PETRAUSKAS 9 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Daniel L. Schiffer and Patrick Zurlinden, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Howard F. Sims ------------------------------------ HOWARD F. SIMS 10 EXHIBIT 24-1 POWER OF ATTORNEY Know All Men By These Presents: That the undersigned director or officer of MCN Corporation, a corporation formed under the laws of the State of Michigan, does constitute and appoint Alfred R. Glancy III and Daniel L. Schiffer, and each of them, his true and lawful attorneys and agents, each with full power and authority (acting alone and without the other) to execute in the name and on behalf of the undersigned as such director or officer, a Registration Statement on Form S-3, including any post-effective amendments and any subsequent Registration Statement filed by MCN Corporation pursuant to Rule 462(b) of the Securities Act of 1933, as amended (the "1933 Act") or other filings in connection therewith, under the 1933 Act, with respect to the issuance of up to $500,000,000 maximum aggregate offering price of debt securities of MCN Investment Corporation; granting to such attorneys and agents, and each of them, full power of substitution and revocation in the premises; and ratifying and confirming all that such attorneys and agents, or either of them, may do or cause to be done by virtue of these presents. In Witness Whereof, I have executed this Power of Attorney this 22nd day of February, 1996. Patrick Zurlinden ------------------------------------ PATRICK ZURLINDEN