40 Amp

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Merlin Gerin 40 Amp Circuit Breaker NSC100N 40 Used 78135
Merlin Gerin 40 Amp Circuit Breaker NSC100N 40 Used 78135
$75.00
quality
SQUARE D FHL FHL36040 3 POLE 600V 40 AMP CIRCUIT BREAKER GRAY
SQUARE D FHL FHL36040 3 POLE 600V 40 AMP CIRCUIT BREAKER GRAY
$65.00
quality
Challenger Type C C340 3 Pole 40 amp Circuit Breaker
Challenger Type C C340 3 Pole 40 amp Circuit Breaker
$31.00
quality
CUTLER HAMMER CIRCUIT BREAKER 3 POLE 40 AMP 600V FDC3040
CUTLER HAMMER CIRCUIT BREAKER 3 POLE 40 AMP 600V FDC3040
$167.49
quality
CUTLER HAMMER INDUSTRIAL CIRCUIT BREAKER 40 AMP 3P 600 V FDB3040LB02
CUTLER HAMMER INDUSTRIAL CIRCUIT BREAKER 40 AMP 3P 600 V FDB3040LB02
$60.29
quality
GE THQL32040 3 POLE 40 AMP 240 VOLT PLUG IN Circuit Breaker
GE THQL32040 3 POLE 40 AMP 240 VOLT PLUG IN Circuit Breaker
$18.00
quality
WESTINGHOUSE 3P 100 AMP 480 V EHD3100 W 1494D N40 OPERATING MECHANISM
WESTINGHOUSE 3P 100 AMP 480 V EHD3100 W 1494D N40 OPERATING MECHANISM
$89.99
quality
ALLEN BRADLEY Manual Motor Controller Protector 25 4 Amp 140M C2E B40
ALLEN BRADLEY Manual Motor Controller Protector 25 4 Amp 140M C2E B40
$30.00
quality
Crouse Hinds MP140 Circuit Breaker 1 Pole 40 Amp Used
Crouse Hinds MP140 Circuit Breaker 1 Pole 40 Amp Used
$6.50
quality
2 Pole 40 Amp 120 240 Volt Cutler Hammer BAB2040 Circuit BREAKER USED
2 Pole 40 Amp 120 240 Volt Cutler Hammer BAB2040 Circuit BREAKER USED
$29.00
quality
lot of 5 NEW Murray 40 Amp 2 Pole Breaker
lot of 5 NEW Murray 40 Amp 2 Pole Breaker
$34.99
quality
1 Square D FAL34040 Circuit Breaker 240 480 40 amp 3 Phase Office1 7
1 Square D FAL34040 Circuit Breaker 240 480 40 amp 3 Phase Office1 7
$39.97
quality
GE 40 AMP 3 POLE BREAKER THQC32040
GE 40 AMP 3 POLE BREAKER THQC32040
$30.00
quality
WESTINGHOUSE INDUSTRIAL CIRCUIT BREAKER 20 AMPS 40C 480 VAC 3 POLE CATEHD3020 S
WESTINGHOUSE INDUSTRIAL CIRCUIT BREAKER 20 AMPS 40C 480 VAC 3 POLE CATEHD3020 S
$139.99
quality
CUTLER HAMMER WESTINGHOUSE Type HFD Circuit Breaker 3 Pole 40 Amp HFD3040
CUTLER HAMMER WESTINGHOUSE Type HFD Circuit Breaker 3 Pole 40 Amp HFD3040
$250.00
quality
SQUARE D FH36040 CIRCUIT BREAKER 40 AMP I LINE BREAKER 600 VAC 3 POLE Used
SQUARE D FH36040 CIRCUIT BREAKER 40 AMP I LINE BREAKER 600 VAC 3 POLE Used
$40.00
quality
General Electric 20 Amp Circuit Breaker 40C
General Electric 20 Amp Circuit Breaker 40C
$10.80
quality
CUTLER HAMMER EATON 40 AMP 3 POLE CIRCUIT BREAKER QBHW3040H  YA 608
CUTLER HAMMER EATON 40 AMP 3 POLE CIRCUIT BREAKER QBHW3040H YA 608
$32.00
quality
Cutler Hammer FD3040 40 Amp 3 pole 600 VOLT Circuit Breaker WARRANTY
Cutler Hammer FD3040 40 Amp 3 pole 600 VOLT Circuit Breaker WARRANTY
$125.00
quality
SQUARE D FAL34040 CIRCUIT BREAKER 40 AMP 3 POLE 480 VOLT
SQUARE D FAL34040 CIRCUIT BREAKER 40 AMP 3 POLE 480 VOLT
$150.00
quality
Cutler Hammer EHC EHC3040 40 amp 3 pole 480v circuit breaker chipped
Cutler Hammer EHC EHC3040 40 amp 3 pole 480v circuit breaker chipped
$50.00
quality
CUTLER HAMMER  CIRCUIT BREAKER EGE3040FFG 40A 3 POLES 480V
CUTLER HAMMER CIRCUIT BREAKER EGE3040FFG 40A 3 POLES 480V
$150.00
quality
CHQ240 Cutler Hammer Circuit Breaker 2 Pole 40 Amp 120 240V
CHQ240 Cutler Hammer Circuit Breaker 2 Pole 40 Amp 120 240V
$11.95
quality
Westinghouse BA BAB BA3040h 40 amp 3 pole 240v Circuit Breaker
Westinghouse BA BAB BA3040h 40 amp 3 pole 240v Circuit Breaker
$50.00
quality
Westinghouse BA BAB BA3040h 40 amp 3 pole 240v Circuit Breaker chipped
Westinghouse BA BAB BA3040h 40 amp 3 pole 240v Circuit Breaker chipped
$45.00
quality
GE THHQB32040 40 AMP 3 POLE 240 VOLT 22K Circuit Breaker NEW PULL OUT
GE THHQB32040 40 AMP 3 POLE 240 VOLT 22K Circuit Breaker NEW PULL OUT
$59.00
quality
GE THQL32040ST1 Circuit Breaker 3 Pole 40 Amp New
GE THQL32040ST1 Circuit Breaker 3 Pole 40 Amp New
$150.00
quality
General Electric Breaker Issue XR 2438 3 Pole 40AMP TQSTA1
General Electric Breaker Issue XR 2438 3 Pole 40AMP TQSTA1
$35.00
quality
WESTINGHOUSE BREAKER HF3040 40A 40 A AMP 600Vac 3 POLE
WESTINGHOUSE BREAKER HF3040 40A 40 A AMP 600Vac 3 POLE
$125.00
quality
Zinsco 40 Amp QB240 2 Pole Bolt in Circuit Breaker Type QB
Zinsco 40 Amp QB240 2 Pole Bolt in Circuit Breaker Type QB
$125.00
quality
GENERAL ELECTRIC 40 AMP 3 POLE CIRCUIT BREAKER AT32040  F 47
GENERAL ELECTRIC 40 AMP 3 POLE CIRCUIT BREAKER AT32040 F 47
$24.50
quality
Siemens ED62B040 40 Amp 2 Pole 600 Volt Circuit Breaker Warranty
Siemens ED62B040 40 Amp 2 Pole 600 Volt Circuit Breaker Warranty
$75.00
quality
NEW SIEMENS ITE 40 AMP 40A CIRCUIT BREAKER ED63M040
NEW SIEMENS ITE 40 AMP 40A CIRCUIT BREAKER ED63M040
$109.95
quality
ABB Circuit Breaker T1N 40A 40 A Amp 3P 230 500V Used
ABB Circuit Breaker T1N 40A 40 A Amp 3P 230 500V Used
$26.24
quality
EATON CROUSE HINDS MP140 CIRCUIT BREAKER 40AMP 1 POLE 120 240VAC
EATON CROUSE HINDS MP140 CIRCUIT BREAKER 40AMP 1 POLE 120 240VAC
$5.00
quality
Siemens Q23040CT2 30 Amp Double Pole 40 Amp Double Pole 10 Kaic Circuit Breaker
Siemens Q23040CT2 30 Amp Double Pole 40 Amp Double Pole 10 Kaic Circuit Breaker
$32.54
quality
QD3B040 Siemens ITE Type QD Plug In Circuit Breaker 3 Pole 40 Amp 240V
QD3B040 Siemens ITE Type QD Plug In Circuit Breaker 3 Pole 40 Amp 240V
$174.99
quality
MERLIN GERIN 24544 CIRCUIT BREAKER 40AMP 3POLE 480VAC TYPE D
MERLIN GERIN 24544 CIRCUIT BREAKER 40AMP 3POLE 480VAC TYPE D
$85.95
quality
Challenger FPE Stab Lok 2 Pole Thick 40 Amp Circuit Breaker NA240 Type NA
Challenger FPE Stab Lok 2 Pole Thick 40 Amp Circuit Breaker NA240 Type NA
$16.99
quality
Moeller NZMB2 A40 NA 3 Pole Circuit Breaker 32 40 Amp Adj Overload 600V NZM2
Moeller NZMB2 A40 NA 3 Pole Circuit Breaker 32 40 Amp Adj Overload 600V NZM2
$179.99
quality
Airpax 40amp 1mlk1 1rs5
Airpax 40amp 1mlk1 1rs5
$35.00
quality
SQUARE D FAL FAL340401021 3 POLE 480V 40 AMP FAL34040 1021 BREAKER WITH SHUNT
SQUARE D FAL FAL340401021 3 POLE 480V 40 AMP FAL34040 1021 BREAKER WITH SHUNT
$150.00
quality
Square D IF34040 40 AMP 3 POLE I LINE Circuit BreakerRECON W TEST REPORT
Square D IF34040 40 AMP 3 POLE I LINE Circuit BreakerRECON W TEST REPORT
$200.00
quality
New Westinghouse EHB3040 Circuit breaker 3 Pole 40 Amp 480V
New Westinghouse EHB3040 Circuit breaker 3 Pole 40 Amp 480V
$85.45
quality
QP3040 BRYANT Circuit Breaker 3 Pole 40 Amp 240V New
QP3040 BRYANT Circuit Breaker 3 Pole 40 Amp 240V New
$64.45
quality
EGB34040 Square D Breaker 40 Amps 480 Volts 3 Pole
EGB34040 Square D Breaker 40 Amps 480 Volts 3 Pole
$226.00
quality
20 NEW GE THQL1140 40 AMP 1 POLE PLUG IN CIRCUIT BREAKER SALE LOOK
20 NEW GE THQL1140 40 AMP 1 POLE PLUG IN CIRCUIT BREAKER SALE LOOK
$29.99
quality
SQUARE D CIRCUIT BREAKER 3 POLE 40 AMP TYPE FAL
SQUARE D CIRCUIT BREAKER 3 POLE 40 AMP TYPE FAL
$45.99
quality
40 Amp Cutler Hammer Breaker
40 Amp Cutler Hammer Breaker
$29.99
quality
GENERAL ELECTRIC 2 POLE 40C 30 AMP
GENERAL ELECTRIC 2 POLE 40C 30 AMP
$10.80
quality
GE twin THQP THQP240 40 amp breaker amp circuit
GE twin THQP THQP240 40 amp breaker amp circuit
$5.99
quality
GE Industrial Circuit Breaker 3 pole TED134040 480 VAC 40 amp
GE Industrial Circuit Breaker 3 pole TED134040 480 VAC 40 amp
$60.00
quality
Square D Circuit Breaker 40 Amp 3 Pole
Square D Circuit Breaker 40 Amp 3 Pole
$55.00
quality
GE General Electric 40 Amp Circuit Breaker THEF136040
GE General Electric 40 Amp Circuit Breaker THEF136040
$50.00
quality
QO240 Square D Breaker 40 Amps 240 Volts 2 Pole
QO240 Square D Breaker 40 Amps 240 Volts 2 Pole
$20.00
quality
GENERAL ELECTRIC TQL32040 CIRCUIT BREAKER 3 POLE 40 AMP 240 VOLT
GENERAL ELECTRIC TQL32040 CIRCUIT BREAKER 3 POLE 40 AMP 240 VOLT
$19.99
quality
Cutler Hammer HFD3040 Circuit Breaker 40 Amp 65 kAIC Used
Cutler Hammer HFD3040 Circuit Breaker 40 Amp 65 kAIC Used
$40.75
quality
Bryant BR340 40 Amp 3 Pole Plug On Common Trip Circuit Breaker 40A 3P 240VAC
Bryant BR340 40 Amp 3 Pole Plug On Common Trip Circuit Breaker 40A 3P 240VAC
$29.99
quality
NEW SQUARE D 20 AMP 2 POLE CIRCUIT BREAKER QOB220VH L 40A
NEW SQUARE D 20 AMP 2 POLE CIRCUIT BREAKER QOB220VH L 40A
$44.99
quality
Eaton Cutler Hammer EHD3040L 40 Amp 3 Pole Industrial Circuit Breaker
Eaton Cutler Hammer EHD3040L 40 Amp 3 Pole Industrial Circuit Breaker
$95.99
quality
SQUARE D 994340 CIRCUIT BREAKER 40 AMP 600 VOLT 3 POLE
SQUARE D 994340 CIRCUIT BREAKER 40 AMP 600 VOLT 3 POLE
$79.57
quality
Square D FA 3 pole 40 amp 240v FA32040 Circuit Breaker FREE SHIPPING
Square D FA 3 pole 40 amp 240v FA32040 Circuit Breaker FREE SHIPPING
$59.99
quality
SB44ED4G General Electric GE Bus Plug 40 Amp 480 V 3 Pole
SB44ED4G General Electric GE Bus Plug 40 Amp 480 V 3 Pole
$1,800.00
quality
PUSHMATIC P4040 2 FOUR POLE 40AMP BKR W ONE MISSING METAL TAB ON TOP
PUSHMATIC P4040 2 FOUR POLE 40AMP BKR W ONE MISSING METAL TAB ON TOP
$110.00
quality
NEW In Box GE TED134040WL Molded Case Circuit Breaker 40Amps 480VAC 250VDC 3 P
NEW In Box GE TED134040WL Molded Case Circuit Breaker 40Amps 480VAC 250VDC 3 P
$165.00
quality
Square D FA34040 3 pole 40 amp 480v circuit breaker used
Square D FA34040 3 pole 40 amp 480v circuit breaker used
$25.00
quality
General Electric GE TED134040 40 amp 480 volt circuit breaker
General Electric GE TED134040 40 amp 480 volt circuit breaker
$30.00
quality
Square D HGL36040 3 Pole 40 Amp Circuit Breaker
Square D HGL36040 3 Pole 40 Amp Circuit Breaker
$269.00
quality
AIRPAX 40 AMP SCREW IN CIRCUIT BREAKER IEGS6 29980 1 V
AIRPAX 40 AMP SCREW IN CIRCUIT BREAKER IEGS6 29980 1 V
$13.20
quality
Siemens BQCH3B040 40AMP 3Pole Bolt On used
Siemens BQCH3B040 40AMP 3Pole Bolt On used
$130.00
quality
SQUARE D QO240 40 AMP 2 POLE CIRCUIT BREAKER
SQUARE D QO240 40 AMP 2 POLE CIRCUIT BREAKER
$5.00
quality
GE CIRCUIT BREAKER 40 AMP 2 POLE TYPE THQL2140
GE CIRCUIT BREAKER 40 AMP 2 POLE TYPE THQL2140
$6.00
quality
New Cutler Hammer Westinghouse BRYANT Br240 40 Amp 2 Pole Circuit Breaker
New Cutler Hammer Westinghouse BRYANT Br240 40 Amp 2 Pole Circuit Breaker
$7.85
quality
New Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
New Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
$8.50
quality
1 year warranty GE 40 AMP CIRCUIT BREAKER THED136040 600 vac
1 year warranty GE 40 AMP CIRCUIT BREAKER THED136040 600 vac
$29.99
quality
1 CUTLER HAMMER TYPE BA BA1040 1 POLE 40A 40 AMP 120 240 VAC 1P 1 POLE
1 CUTLER HAMMER TYPE BA BA1040 1 POLE 40A 40 AMP 120 240 VAC 1P 1 POLE
$3.50
quality
2 Square D circuit breaker FA34040 40amp 30 day warranty
2 Square D circuit breaker FA34040 40amp 30 day warranty
$76.54
quality
New Lot of 2 Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
New Lot of 2 Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
$16.00
quality
GE THEF136040 CIRCUIT BREAKER 40 AMP 600 VOLT 3 POLE FACTORY RECONDITIONED
GE THEF136040 CIRCUIT BREAKER 40 AMP 600 VOLT 3 POLE FACTORY RECONDITIONED
$45.88
quality
SQUARE D 2 POLE 40AMP CIRCUIT BREAKER QO240 NEWEST STYLE
SQUARE D 2 POLE 40AMP CIRCUIT BREAKER QO240 NEWEST STYLE
$7.99
quality
Used Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
Used Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
$6.50
quality
FPE HF631040R 40 Amp 600 Volt 3 Pole Circuit Breaker RECON W TEST REPORT
FPE HF631040R 40 Amp 600 Volt 3 Pole Circuit Breaker RECON W TEST REPORT
$225.00
quality
AIRPAX 40 AMP HYBRID CIRCUIT BREAKER LMLK1 1REC4 28679 40
AIRPAX 40 AMP HYBRID CIRCUIT BREAKER LMLK1 1REC4 28679 40
$22.00
quality
Square D 999240 ML1 40 Amp Circuit Breaker RECON W TEST REPORT
Square D 999240 ML1 40 Amp Circuit Breaker RECON W TEST REPORT
$70.00
quality
Surplus Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
Surplus Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
$8.00
quality
Eaton Cutler Hammer HFD3040 C Series Molded Case Circuit Breaker 40 Amp
Eaton Cutler Hammer HFD3040 C Series Molded Case Circuit Breaker 40 Amp
$195.00
quality
Used Lot of 2 Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
Used Lot of 2 Challenger C140 1 pole 40 amp 120 volt Circuit Breaker BR140
$12.00
quality
Murray MP240 40 Amp 2 Pole 240 Volt Circuit Breaker Free 2 Day Shipping
Murray MP240 40 Amp 2 Pole 240 Volt Circuit Breaker Free 2 Day Shipping
$13.35
quality
GE TED136040 CIRCUIT BREAKER 40 AMP 600 VOLT 3 POLE TESTED
GE TED136040 CIRCUIT BREAKER 40 AMP 600 VOLT 3 POLE TESTED
$26.46
quality
FPE STAB LOK 1 POLE 40 AMP CIRCUIT BREAKER 120 240 TYPE NA THICK
FPE STAB LOK 1 POLE 40 AMP CIRCUIT BREAKER 120 240 TYPE NA THICK
$5.00
quality
Federal Pioneer NEG631040 Circuit Breaker 3Pole 40Amp 600VAC USED
Federal Pioneer NEG631040 Circuit Breaker 3Pole 40Amp 600VAC USED
$39.99
quality
SQUARE D FA34040 40 AMP 3 POLE 480 VOLT I LINE CIRCUIT BREAKER WARRANTY
SQUARE D FA34040 40 AMP 3 POLE 480 VOLT I LINE CIRCUIT BREAKER WARRANTY
$60.00
quality
999340 Square D SQD Circuit Breaker 3 Pole 40 Amp 600V
999340 Square D SQD Circuit Breaker 3 Pole 40 Amp 600V
$100.00
quality
SQUARE D QO QO340 3 POLE 40 AMP BREAKER 3P 40A 240V QO
SQUARE D QO QO340 3 POLE 40 AMP BREAKER 3P 40A 240V QO
$42.95
quality
Square D EHB14040 40 Amp Circuit Breaker D5
Square D EHB14040 40 Amp Circuit Breaker D5
$380.00
quality
Federal STAB LOK 40 amp 2 POLE Type NC CIRCUIT BREAKER
Federal STAB LOK 40 amp 2 POLE Type NC CIRCUIT BREAKER
$18.00
quality
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40 Amp

40+Amp

Frequently Asked Questions...

How do I determine what gauge wire is attached to one of my breakers?

My central air unit requires 35 AMPs, an inspector said I have 10 gauge wire attached to a 40 AMP breaker and is making me replace the wire. The house is 8 years old, and the breaker has never been changed and has passed inspection when the house was built. My basement has been finished and to run a new wire from the breaker box to the unit is going to be nearly impossible. Any help would be great. I want to make sure the inspector is sure its 10 gauge...thanks


Best Answer...

Answer:

The nat elec code lists the wire gaufae for amps as follows
12 ga is to 20 amps
10 ga is it 30 amps
8 ga is to 40 amps
6 ga is to 65 amps

The inspector may have made a mistake but i doubt it. the current 8 ga wire is stranded because it is so thick While 10 ga is a single strand. It may have been wired wrong all along.


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