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Friday, September 17, 2021
Question:
Greetings CQD,
Does a 277-volt instant hot water heater require GFCI protection in a commercial lab. It has been hard wired, no cord/plug.
John Wilhelm
A
Answer:
Hi John,
Thanks for participating. Article 422 provides the requirements for hot water heaters, which are appliances. Section 422.5 provides a list of appliances that require GFCI protection. Instant hot water heaters are not on the list. So the answer is no based on the information provided in the question. Be aware that listed appliances include installation instructions that may require certain types of protection.