Where passing through a floor and located on the outside of a wall, Type NM cable must be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Type RTRC marked with the suffix–XW, or Schedule 80 rigid PVC conduit extending at least ____________________ inches above the floor.

Fill in the blank(s) with the appropriate word(s).


6
six

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The AW values for retaining a presently owned machine for additional years are shown in the table. Note that the values represent the AW amount for each of the n years that the asset is kept, that is, if it is kept 5 more years, the annual worth is $95,000 for each of the 5 years. Assume that future costs remain as estimated for the re­placement study and that used machines like the one presently owned will always be available.

(a) What is the ESL and associated AW of the defender at a MARR of 12% per year?
(b) A challenger with an ESL of 7 years and an AWC = $ ?89,500 per year has been identi­fied. Which AW will be less for the respec­tive ESL periods?

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What type of oil pressure safety switch is used on many semi-hermetic compressors?

a. Fixed input b. Differential pressure c. Dynamic pressure d. Bypass pressure

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A key element of the Clean Air Act is its requirement that companies use the maximum achievable control technology.