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 Glenn Your Own Question
Glenn, Electrical Technician
Category: Electrical
Satisfied Customers: 2311
Experience:  over 30 years as a technician former journeyman electrician
Type Your Electrical Question Here...
Glenn is online now
A new question is answered every 9 seconds

I am installing an American Standard Whirlpool tub in our remodeled

Resolved Question:

I am installing an American Standard Whirlpool tub in our remodeled bath. My pump and heater both require a dedicated 15 amp GFCI protected circuit. Being 15 amp, I went ahead and put in 14 gauge wire for both circuits. Now I see that the tub manual, as best I can understand, indicates 12 gauge needed. (See chart at bottom of page 11 here:

Pump motor is 7.5 amps, heater is 12 amps. Length of NM between receptacles and panel is approximately 45 feet.

I spent an afternoon running the 14 gauge cables through walls, etc. I'm really really hoping I don't have to pull it all out and go buy 12 gauge if there is no real need. But if needed, I will.
Submitted: 8 years ago.
Category: Electrical
Expert:  Glenn replied 8 years ago.


You link didn't work however the 12 amp draw on the heater should be ok on a 15 amp circuit because it really dosen't have an inrush current like a motor does

The pump should be just fine onn the 15 amp circuit

Customer: replied 8 years ago.
Thanks for your reply. The installation instructions have a "wire selection guide" that recommends 12 gauge cable for 50' maximum distance to panel, 10 gauge for 100' distance, 8 gauge for 150' distance, etc.
Why do you think they would recommend the 12 gauge for only a 50' distance on a 15 amp circuit? Thanks
Expert:  Glenn replied 8 years ago.



I don't know rule of thumb and if you do the caculations is anything over 100 feet warrents a larger gauge wire

Customer: replied 8 years ago.
I don't want to go to unnecessary expense and trouble but I want to feel assured I'm doing a good safe job. So you believe I'm ok to leave the 14 gauge in place then?
Expert:  Glenn replied 8 years ago.


I would feel safe with the 14 ga wire the biggest thing is on a long run is the voltage drop which increases amperage


You are only 45 feet that's not even close to worry about

Glenn and other Electrical Specialists are ready to help you