How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike G. Your Own Question
Mike G.
Mike G., Master Electrician
Category: Electrical
Satisfied Customers: 7287
Experience:  Proven Professional 48 years Experience
29848548
Type Your Electrical Question Here...
Mike G. is online now
A new question is answered every 9 seconds

Outside panel shut off is humming loudly. It's always hummed

Customer Question

Hi, Mike: Outside panel for spa shut off is humming loudly. It's always hummed a little. The breaker in the panel is a GFI type. It's a 240 V box. The main panel has a 40 AMP breaker. The spa manufacturer recommends a 50 AMP breaker even though the pump housing indicates a it's a 40 AMP motor. Could this be my problem?
Submitted: 1 year ago.
Category: Electrical
Expert:  Mike G. replied 1 year ago.

Hi, I'm Mike G and I'll be glad to assist you. All circuits should be rated at 80%. A 40A load should have a breaker sized 50A. The noise is the breaker on the verge of tripping. Up size it.

Customer: replied 1 year ago.
Thanks for confirming my suspicion.
Expert:  Mike G. replied 1 year ago.

You're welcome.