POWER OF ATTORNEY



Know all by these presents, that the undersigned hereby constitutes and

appoints each of Diane K. Schumacher, Terrance V. Helz, John P. Kaisersatt

and Barbara A. Widra signing singly, the undersigned's true and lawful

attorney-in-fact to:



(1) prepare, execute in the undersigned's name on the undersigned's behalf,

and submit to the U.S. Securities and Exchange Commission a Form ID, including

amendments thereto, and any other documents necessary or appropriate to obtain

codes and passwords enabling the undersigned to make electronic filings with

the U.S. Securities and Exchange Commission of reports required by Section 16(a)

of the Securities Exchange Act of 1934 or any rule or regulation of the U.S.

Securities and Exchange Commission;



(2) execute for and on behalf of the undersigned, in the undersigned's

capacity as an officer and/or director of Cooper Industries, Ltd.

(the "Corporation"), Forms 3, 4, and 5 in accordance with Section 16(a)

of the Securities Exchange Act of 1934 and the rules thereunder;



(3) do and perform any and all acts for and on behalf of the undersigned which

may be necessary or desirable to complete and execute any such Form 3, 4, or 5,

complete and execute any amendment or amendments thereto, and timely file such form

with the United States Securities and Exchange Commission and any stock

exchange or similar authority; and



(4) take any other action of any type whatsoever in connection with the

foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,

in the best interest of, or legally required by, the undersigned, it being

understood that the documents executed by such attorney-in-fact on behalf of

the undersigned pursuant to this Power of Attorney shall be in such form and

shall contain such terms and conditions as such attorney-in-fact may approve in

such attorney-in-fact's discretion.



The undersigned hereby grants to each such attorney-in-fact full power and

authority to do and perform any and every act and thing whatsoever requisite,

necessary, or proper to be done in the exercise of any of the rights and powers

herein granted, as fully to all intents and purposes as the undersigned might

or could do if personally present, with full power of substitution or

revocation, hereby ratifying and confirming all that such attorney-in-fact, or

such attorney-in-fact's substitute or substitutes, shall lawfully do or cause

to be done by virtue of this power of attorney and the rights and powers herein

granted.  The undersigned acknowledges that the foregoing attorneys-in-fact,

in serving in such capacity at the request of the undersigned, are not

assuming, nor is the Company assuming, any of the undersigned's

responsibilities to comply with Section 16 of the Securities Exchange Act of

1934.



This Power of Attorney shall remain in full force and effect until the

undersigned is no longer required to file Forms 3, 4, and 5 with respect to

the undersigned's holdings of and transactions in securities issued by the

Company, unless earlier revoked by the undersigned in a signed writing

delivered to the foregoing attorneys-in-fact.



IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be

executed as of this 19th day of April, 2005.





Signature:  /s/ Paul M. Isabella



Print Name: Paul M. Isabella