Exhibit 24POWER OF ATTORNEYCOOPER INDUSTRIES, LTD.     KNOW ALL MEN BY THESE PRESENTS, that the undersigned director or officer of Cooper Industries,Ltd. (“Cooper”), a Bermuda corporation, does hereby make, constitute and appoint Diane K.Schumacher and Terrance V. Helz, and each of them acting individually, his true and lawful attorneywith power to act without the other and with full power of substitution, to execute, deliver andfile, for and on behalf of the undersigned, and in his name and in his capacity or capacities asaforesaid, the Cooper Annual Report on Form 10-K with the Securities and Exchange Commission underthe Securities Exchange Act of 1934, as amended, and any other documents in support thereof orsupplemental thereto, with respect to the fiscal year ended December 31, 2005, and any and allamendments thereto. The undersigned hereby grants to said attorneys and each of them full powerand authority to do and perform each and every act and thing whatsoever as said attorney orattorneys may deem necessary or advisable to carry out fully the intent of the foregoing as theundersigned might or could do personally or in the capacity or capacities as aforesaid, herebyratifying and confirming all acts and things which said attorney or attorneys may do or cause to bedone by virtue of these presents.     IN WITNESS WHEREOF, the undersigned has hereunto set his hand this 13th day of February 2006.       /s/   Stephen G. Butler               Stephen G. Butler
 

 
Exhibit 24POWER OF ATTORNEYCOOPER INDUSTRIES, LTD.     KNOW ALL MEN BY THESE PRESENTS, that the undersigned director or officer of Cooper Industries,Ltd. (“Cooper”), a Bermuda corporation, does hereby make, constitute and appoint Diane K.Schumacher and Terrance V. Helz, and each of them acting individually, her true and lawful attorneywith power to act without the other and with full power of substitution, to execute, deliver andfile, for and on behalf of the undersigned, and in her name and in her capacity or capacities asaforesaid, the Cooper Annual Report on Form 10-K with the Securities and Exchange Commission underthe Securities Exchange Act of 1934, as amended, and any other documents in support thereof orsupplemental thereto, with respect to the fiscal year ended December 31, 2005, and any and allamendments thereto. The undersigned hereby grants to said attorneys and each of them full powerand authority to do and perform each and every act and thing whatsoever as said attorney orattorneys may deem necessary or advisable to carry out fully the intent of the foregoing as theundersigned might or could do personally or in the capacity or capacities as aforesaid, herebyratifying and confirming all acts and things which said attorney or attorneys may do or cause to bedone by virtue of these presents.     IN WITNESS WHEREOF, the undersigned has hereunto set his hand this 13th day ofFebruary 2006.       /s/   Linda A. Hill               Linda A. Hill
 

 
Exhibit 24POWER OF ATTORNEYCOOPER INDUSTRIES, LTD.     KNOW ALL MEN BY THESE PRESENTS, that the undersigned director or officer of Cooper Industries,Ltd. (“Cooper”), a Bermuda corporation, does hereby make, constitute and appoint Diane K.Schumacher and Terrance V. Helz, and each of them acting individually, his true and lawful attorneywith power to act without the other and with full power of substitution, to execute, deliver andfile, for and on behalf of the undersigned, and in his name and in his capacity or capacities asaforesaid, the Cooper Annual Report on Form 10-K with the Securities and Exchange Commission underthe Securities Exchange Act of 1934, as amended, and any other documents in support thereof orsupplemental thereto, with respect to the fiscal year ended December 31, 2005, and any and allamendments thereto. The undersigned hereby grants to said attorneys and each of them full powerand authority to do and perform each and every act and thing whatsoever as said attorney orattorneys may deem necessary or advisable to carry out fully the intent of the foregoing as theundersigned might or could do personally or in the capacity or capacities as aforesaid, herebyratifying and confirming all acts and things which said attorney or attorneys may do or cause to bedone by virtue of these presents.     IN WITNESS WHEREOF, the undersigned has hereunto set his hand this 13th day ofFebruary 2006.       /s/   James J. Postl               James J. Postl
 

 
Exhibit 24POWER OF ATTORNEYCOOPER INDUSTRIES, LTD.     KNOW ALL MEN BY THESE PRESENTS, that the undersigned director or officer of Cooper Industries,Ltd. (“Cooper”), a Bermuda corporation, does hereby make, constitute and appoint Diane K.Schumacher and Terrance V. Helz, and each of them acting individually, his true and lawful attorneywith power to act without the other and with full power of substitution, to execute, deliver andfile, for and on behalf of the undersigned, and in his name and in his capacity or capacities asaforesaid, the Cooper Annual Report on Form 10-K with the Securities and Exchange Commission underthe Securities Exchange Act of 1934, as amended, and any other documents in support thereof orsupplemental thereto, with respect to the fiscal year ended December 31, 2005, and any and allamendments thereto. The undersigned hereby grants to said attorneys and each of them full powerand authority to do and perform each and every act and thing whatsoever as said attorney orattorneys may deem necessary or advisable to carry out fully the intent of the foregoing as theundersigned might or could do personally or in the capacity or capacities as aforesaid, herebyratifying and confirming all acts and things which said attorney or attorneys may do or cause to bedone by virtue of these presents.     IN WITNESS WHEREOF, the undersigned has hereunto set his hand this 13th day ofFebruary 2006.       /s/   Dan F. Smith               Dan F. Smith
 

 
Exhibit 24POWER OF ATTORNEYCOOPER INDUSTRIES, LTD.     KNOW ALL MEN BY THESE PRESENTS, that the undersigned director or officer of Cooper Industries,Ltd. (“Cooper”), a Bermuda corporation, does hereby make, constitute and appoint Diane K.Schumacher and Terrance V. Helz, and each of them acting individually, his true and lawful attorneywith power to act without the other and with full power of substitution, to execute, deliver andfile, for and on behalf of the undersigned, and in his name and in his capacity or capacities asaforesaid, the Cooper Annual Report on Form 10-K with the Securities and Exchange Commission underthe Securities Exchange Act of 1934, as amended, and any other documents in support thereof orsupplemental thereto, with respect to the fiscal year ended December 31, 2005, and any and allamendments thereto. The undersigned hereby grants to said attorneys and each of them full powerand authority to do and perform each and every act and thing whatsoever as said attorney orattorneys may deem necessary or advisable to carry out fully the intent of the foregoing as theundersigned might or could do personally or in the capacity or capacities as aforesaid, herebyratifying and confirming all acts and things which said attorney or attorneys may do or cause to bedone by virtue of these presents.     IN WITNESS WHEREOF, the undersigned has hereunto set his hand this 13th day ofFebruary 2006.       /s/   Gerald B. Smith               Gerald B. Smith