• 100% Satisfaction Guarantee
Category: Electrical
Satisfied Customers: 3343
Experience:  30 years Licensed Electrical Contractor in Illinois, Adjunct College Electrical Instructor, Former Electrical Inspector, Diploma: Digital Electronics, FCC Technician License
71008832
Kevin is online now

# Every time I turn 2 upstairs ac on the power goes out, why?

### Customer Question

Every time I turn 2 upstairs ac on the power goes out, why?
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: About 5 times since yesterday
JA: Do you plan on doing the work yourself?
Customer: Yes
Customer: I just don't know why it's happening when it never happened before
Submitted: 8 months ago.
Category: Electrical
Customer: replied 8 months ago.
Expert:  Kevin replied 8 months ago.

Hello and welcome to Just Answer. My name is ***** ***** I will be happy to assist you with your electrical question.

1) Are the A/C units window units on individual dedicated circuits or are these 2 separate Central A/C units?

2) What is the voltage of the A.C units? 120 or 240 volts?

3) Take a look at the nameplate rating . How many watts per A/C unit?

4) What areas of the home are effected by the loss of power? Individual rooms or the entire home?

Need more details before i can provide answers and/or recommendations as to the problem?

Customer: replied 8 months ago.
1)they are window units
2) 115 voltage with 925 watts and 8.8 amps is one , the other one I'm not too sure my daughters room is locked and she is not here.
3) only the upstairs is affected
Customer: replied 8 months ago.
Do you think I will need a new breaker ?
Expert:  Kevin replied 8 months ago.

Thanks for the replies.

1) It is recommended that the A/C units reside on their own dedicated circuits, ..........ie....... a 15 amp circuit. If the A/C unit is a continuous load and in the ON position for 3 hours or more, the circuit requires 11 amps.

8.8 amps x 1.25 = 11 amps. Any load sharing on the circuit can cause an overload and trip the circuit breaker.

2) No you need a dedicated circuit to compensate for other shared loads.

Expert:  Kevin replied 8 months ago.

1) By code, a cord & plug connected 15 amp circuit has a maximum amperage of 12 amps. If the A/C window unit is shared with other connected loads on the same circuit, the total loads can overload and trip the circuit breaker. Thus the reason for a dedicated circuit for the window A/C units.

Customer: replied 8 months ago.
how can we solve this problem ? Do we need a different breaker ?
Expert:  Kevin replied 8 months ago.

1) You need a dedicated circuit for each A/C window unit. If load sharing with lights, and TV's, etc. all on the same circuit, the circuit is subject to being over loaded and the breaker will trip.

2) An option is to install a 20 amp dedicated circuit to each room, but the branch circuit wires will require 12 AWG copper from the main panel extended out to the remainder of the room loads.

Customer: replied 8 months ago.
Do you think if I disconnect my mini fridge upstairs that it will help?
Expert:  Kevin replied 8 months ago.

Might possibly help, can't hurt. All depends upon the to total running wattage on the circuit.

If you have any additional questions, just let me know and I’ll be glad to answer them for you.

Otherwise, don’t forget to rate me before you log Off.

Thanks...............Kevin:)

Expert:  Kevin replied 8 months ago.

If you have any additional questions, just let me know and I’ll be glad to answer them for you.

Otherwise, don’t forget to rate me before you log Off.

Thanks...............Kevin:)

Expert:  Kevin replied 8 months ago.

If you have any additional questions, just let me know and I’ll be glad to answer them for you.

Otherwise, don’t forget to rate me before you log Off.

Thanks...............Kevin:)

Expert:  Kevin replied 8 months ago.

If you have any additional questions, just let me know and I’ll be glad to answer them for you.

Otherwise, don’t forget to rate me before you log Off.

Thanks..............Kevin:)

Expert:  Kevin replied 8 months ago.

If you have any additional questions, just let me know and I’ll be glad to answer them for you.

Otherwise, don’t forget to rate me before you log Off.

Thanks..............Kevin:)

Expert:  Kevin replied 8 months ago.

If you have any additional questions, just let me know and I’ll be glad to answer them for you.

Otherwise, don’t forget to rate me before you log Off.

Thanks.................Kevin:)

Expert:  Kevin replied 8 months ago.

If you have any additional questions, just let me know and I’ll be glad to answer them for you.

Otherwise, don’t forget to rate me before you log Off.

Thanks.................Kevin:)

Expert:  Kevin replied 8 months ago.

If you have any additional questions, just let me know and I’ll be glad to answer them for you.

Otherwise, don’t forget to rate me before you log Off.

Thanks...............Kevin:)