A Code Type Question

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Sparky Gunny

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What is the MINIMUM size underground service lateral for a copper-clad aluminum single-branch circuit serving a controlled water heater?
 
Re: A Code Type Question

It's aluminum wire that is coated (through some bizare chemical process) with copper. I didn't record the place where I stole (I mean researched) the following description:
Copper-clad aluminum, or CCA, combines the light weight, high flexibility, and low cost of aluminum with the conductivity and corrosion resistance of copper. It is used where these qualities are beneficial to a cable. Copper-clad aluminum is used extensively in overhead coaxial cable for high frequency television signals. It is used to replace copper as grounding conductor on structures. CCA replaces aluminum in overhead power lines in corrosive environments. It also replaces copper in underground power lines to combat corrosion and theft problems.
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Re: A Code Type Question

The smallest copper-clad aluminum service lateral conductor permitted to serve a controlled water heater is No. 10 AWG per 230.31(B) Exception. Good luck on your exam.
 
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