National Electrical Installation Standards

Standards as High as Your Own

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Monday, December 19, 2016

Question:

Is it permissible to install a security alarm system alarm wire sharing the same rigid metal conduit as a 240 V feed to a car charging station? It is an underground conduit run from the front of the residence approximately 10 feet distance under the sidewalk to curbside.

I have a client who needs a charging station and wants a tamper alarm installed onto his curbside charger.

Thank you. Michael Janiszewski

A

Answer:

Hey Michael thanks for your question. If the security alarm system wiring is a Class 2 circuit, which is likely, then no, separation is required as stated in 725.136. You should be able to tell from the power supply marking and the manufacturer's instructions.

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