rhineo007 t1_j5t93h3 wrote on January 25, 2023 at 12:16 PM

Reply to comment by Mastasmoker in Making room for Tesla charger 60amp breaker by rxinquestion

This is completely incorrect. Breakers are rated/sized to allow for this. And it’s not 6/7 times, you rate the breaker 250% of rated load, for most motors.

Mastasmoker t1_j5ta35w wrote on January 25, 2023 at 12:26 PM

Correct they are sized (amp rating) to allow for inrush current on the entire panel but this person is adding a 60 amp circuit for a charger thats going to be drawing 50 amps. Add in all appliances and other devices in the house plus 2 ac units.

Breakers can handle inrush current of startup for a split second period of time. The two ac units, if starting up at the exact time could cause it to trip. It does happen, albeit not all the time. The 5-7 times the rated amperage is based off the nameplate data of the ac unit, not the breaker. Dont know how you thought i meant that.

I dont know what your point was other than to try to say I dont know what Im talking about. Sounds like you know enough to be dangerous.

rhineo007 t1_j5tnsv5 wrote on January 25, 2023 at 2:21 PM

As a master electrician and an EET, your right, I do know enough to be dangerous, but I also understand residential load calculations, and that not everything turns on at once. If those are the ideas you are trying to scare people with, then every house in the world would trip under full load of all the breakers, but that’s not how it works/calculated, but you would know that if you were an electrician. Just saying 🤷