I have a new Stelpro RUH5-51T heater I'd like to 'safely' install in the garage. It's 240/208 v, 5000/3750 w, 50-60 Hz, 1 phase. The plate on the unit says 20.84 amps. Does this mean I can't use 12 gauge wire with 20 amp breaker? The run from the breaker box would be ~20-25 ft. Do I need to go with 10 ga with 25 or 30 amp breaker? The unit requires the green wire ground connection to the breaker box. Also, conduit protection, can I use flexible metal or do I have to use metal tube? THANKS!!!!!!
You can use 10-2 with ground protected by a thirty amp double. I'd use 3/4 inch flex, but the job would be easier if you use THHN or THWN, instead of NMC with the flex.
Thanks for posting on ElectricianTalk.com. The Moderators/Admin of this forum would prefer if you post Do It Yourself related topics on our sister site www.DIYChatroom.com
As stated in the sign up page, ElectricianTalk.com is designed for electrical industry professionals to discuss issues and topics related to the electrical trades and related industries. Many of our professionals are also members at DIYChatroom.com and are looking forward to assist you with your needs.
A forum community dedicated to professional electricians, contractors, and apprentices for residential and commercial work. Come join the discussion about trade knowledge, tools, certifications, wiring, builds, scales, reviews, accessories, classifieds, and more!