<PAGE>   1




                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, his true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in his name and on his behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.

     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                       /s/  Stephen E. Ewing
                                       ------------------------
                                            Stephen E. Ewing






<PAGE>   2






                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, his true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in his name and on his behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.


     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                  /s/ William K. McCrackin
                                                  -------------------------
                                                      William K. McCrackin





<PAGE>   3






                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, his true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in his name and on his behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.


     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                    /s/ Roger Fridholm
                                                    -----------------------
                                                        Roger Fridholm





<PAGE>   4






                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, his true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in his name and on his behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.


     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.




                                                     /s/ Frank M. Hennessey
                                                     ------------------------
                                                         Frank M. Hennessey





<PAGE>   5






                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, his true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in his name and on his behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.


     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                      /s/ Thomas H. Jeffs II
                                                      -----------------------
                                                          Thomas H. Jeffs II





<PAGE>   6






                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, his true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in his name and on his behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.


     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                        /s/ Bill M. Thompson
                                                        ----------------------
                                                            Bill M. Thompson





<PAGE>   7






                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, his true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in his name and on his behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.

     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                        /s/ Dale A. Johnson
                                                        ---------------------
                                                            Dale A. Johnson





<PAGE>   8





                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, her true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in her name and on her behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.


     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                      /s/ Helen O. Petrauskas
                                                      ------------------------
                                                          Helen O. Petrauskas








<PAGE>   9




                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Alfred R. Glancy III, Daniel
L. Schiffer and Harold Gardner, and each of them, his true and lawful attorneys
and agents, each with full power and authority (acting alone and without the
others) to execute in his name and on his behalf and to file with the
Securities and Exchange Commission an Annual Report on Form 10-K for the year
ended December 31, 1996, including all amendments.


     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                          /s/ Howard F. Sims
                                                          ---------------------
                                                              Howard F. Sims



<PAGE>   10




                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby 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 his name and on his behalf and to file with the Securities and
Exchange Commission an Annual Report on Form 10-K for the year ended December
31, 1996, including all amendments.

     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                          /s/ Harold Gardner
                                                          --------------------
                                                              Harold Gardner


















<PAGE>   11


                                                                    EXHIBIT 24-1

                               POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That the undersigned Director or Officer of MCN CORPORATION, a Michigan
corporation, does hereby constitute and appoint, Daniel L. Schiffer and Harold
Gardner, 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 his
name and on his behalf and to file with the  Securities and Exchange Commission
an Annual Report on Form 10-K for the year ended December 31, 1996, including
all amendments.

     IN WITNESS WHEREOF, I have executed this Power of Attorney this 26th day
of February, 1997.



                                                     /s/ Alfred R. Glancy III
                                                     -------------------------
                                                         Alfred R. Glancy III