40 Amp

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5SY4140 7 CIRCUIT BREAKER 40AMP 1POLE 230 400VAC C CURVE
5SY4140 7 CIRCUIT BREAKER 40AMP 1POLE 230 400VAC C CURVE
$20.00
quality
Lot of 16 General Electric Circuit Breaker 40 Amp 1 Pole GE THQP140
Lot of 16 General Electric Circuit Breaker 40 Amp 1 Pole GE THQP140
$41.89
quality
FPE 1 Pole 40 Amp Stab Lok Circuit Breaker Cat NA140
FPE 1 Pole 40 Amp Stab Lok Circuit Breaker Cat NA140
$10.00
quality
NEW ALLEN BRADLEY 140U KTD3 D40 CIRCUIT BREAKER TRIP UNIT 400 AMPS
NEW ALLEN BRADLEY 140U KTD3 D40 CIRCUIT BREAKER TRIP UNIT 400 AMPS
$575.00
quality
NIB Cutler Hammer GD3040 GD 22K 3 Pole 40 amp Circuit Breaker
NIB Cutler Hammer GD3040 GD 22K 3 Pole 40 amp Circuit Breaker
$225.00
quality
Cutler Hammer HFD3040 40 Amp 3 Pole 600 Volt Circuit Breaker WARRANTY
Cutler Hammer HFD3040 40 Amp 3 Pole 600 Volt Circuit Breaker WARRANTY
$180.00
quality
Siemens ITE B340 BOLT ON Circuit Breaker 3 Pole 40 Amp 3P USED
Siemens ITE B340 BOLT ON Circuit Breaker 3 Pole 40 Amp 3P USED
$19.99
quality
UBI for Wadsworth 40 Amp HACR 2 Pole Circuit Breaker big housing Free Ship 40A
UBI for Wadsworth 40 Amp HACR 2 Pole Circuit Breaker big housing Free Ship 40A
$58.90
quality
Lot of 2 New General Electric THQB1140 1 pole 40 amp Circuit Breaker GE
Lot of 2 New General Electric THQB1140 1 pole 40 amp Circuit Breaker GE
$14.02
quality
Lot of 2 USED General Electric GE THQB1140 1 pole 40 amp Circuit Breaker
Lot of 2 USED General Electric GE THQB1140 1 pole 40 amp Circuit Breaker
$8.88
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
$70.00
quality
Square D FA3604035 I Line Circuit Breaker 40 Amp 3 Pole 600 V
Square D FA3604035 I Line Circuit Breaker 40 Amp 3 Pole 600 V
$115.00
quality
FAL24040 40 Amp 2 Pole 480 Volt Molded Case Circuit Breakers from Square D
FAL24040 40 Amp 2 Pole 480 Volt Molded Case Circuit Breakers from Square D
$50.00
quality
Square D QO240PLILC Circuit Breaker 40 Amp Remote Control NEW
Square D QO240PLILC Circuit Breaker 40 Amp Remote Control NEW
$45.00
quality
CH240 Cutler Hammer Type CH Circuit Breaker 2 Pole 40 Amp 240V PLASTIC FOOT
CH240 Cutler Hammer Type CH Circuit Breaker 2 Pole 40 Amp 240V PLASTIC FOOT
$14.99
quality
GE THED124040 40 Amp 2 Pole 480 Volt Circuit Breaker Warranty
GE THED124040 40 Amp 2 Pole 480 Volt Circuit Breaker Warranty
$35.00
quality
GE Model 40C 2 Pole 20Amp Circuit Breaker
GE Model 40C 2 Pole 20Amp Circuit Breaker
$9.85
quality
EDB34040 Square D Breaker 40 Amps 480 Volts 3 Pole
EDB34040 Square D Breaker 40 Amps 480 Volts 3 Pole
$133.00
quality
AIRPAX 40 AMP BULLET CIRCUIT BREAKER LELK1 1REC4 30326 40
AIRPAX 40 AMP BULLET CIRCUIT BREAKER LELK1 1REC4 30326 40
$38.25
quality
General Electric 40C 15 Amp Circuit Breaker 2 Pole
General Electric 40C 15 Amp Circuit Breaker 2 Pole
$9.85
quality
Cutler Hammer BAB 1040 Circuit Breaker 1 Pole 120 240V 40Amp USED
Cutler Hammer BAB 1040 Circuit Breaker 1 Pole 120 240V 40Amp USED
$10.99
quality
federal electric stab lok breaker40 amp black handle used
federal electric stab lok breaker40 amp black handle used
$15.00
quality
Cutler Hammer BQC BRD BQ2402120 1 Pole 20 Amp 2 Pole 40 Amp Quad Breaker
Cutler Hammer BQC BRD BQ2402120 1 Pole 20 Amp 2 Pole 40 Amp Quad Breaker
$32.99
quality
CHB340 Cutler Hammer Type CHB Circuit Breaker 3 Pole 40 Amp 240V
CHB340 Cutler Hammer Type CHB Circuit Breaker 3 Pole 40 Amp 240V
$84.99
quality
EATON CUTLER HAMMER Type HFD Circuit Breaker 2 Pole 40 Amp HFD2040
EATON CUTLER HAMMER Type HFD Circuit Breaker 2 Pole 40 Amp HFD2040
$175.00
quality
LOT OF 3 STAB LOK BREAKERS TYPE NA NI 40 AMP TYPE NC 20A TYPE NC 30A
LOT OF 3 STAB LOK BREAKERS TYPE NA NI 40 AMP TYPE NC 20A TYPE NC 30A
$18.00
quality
NEW SIEMENS CIRCUIT BREAKER 3VF2313 1FJ41 0AA0 3VF23131FJ410AA0 40 AMP 3 POLE
NEW SIEMENS CIRCUIT BREAKER 3VF2313 1FJ41 0AA0 3VF23131FJ410AA0 40 AMP 3 POLE
$39.95
quality
ABB Circuit Breaker S3H040TWS4 40 Amp 3 Pole
ABB Circuit Breaker S3H040TWS4 40 Amp 3 Pole
$285.00
quality
westinghouse bryant breaker br140 40 amp 1 pole
westinghouse bryant breaker br140 40 amp 1 pole
$12.00
quality
1 NEW SIEMENS BL B240 CIRCUIT BREAKER 40A 40 AMP 2P 2 POLE 240V 240 VOLT
1 NEW SIEMENS BL B240 CIRCUIT BREAKER 40A 40 AMP 2P 2 POLE 240V 240 VOLT
$15.00
quality
Square D HDL26040 Circuit Breaker 40 Amp Lug to Lug NEW
Square D HDL26040 Circuit Breaker 40 Amp Lug to Lug NEW
$135.00
quality
GV3P 65 Schneider Electric Motor Circuit Breaker 48 65 Amp
GV3P 65 Schneider Electric Motor Circuit Breaker 48 65 Amp
$211.99
quality
CUTLER HAMMER Gi 125 40 AMP CIRCUIT BREAKER
CUTLER HAMMER Gi 125 40 AMP CIRCUIT BREAKER
$63.19
quality
New Cutler Hammer CHB240 2 Pole 40 Amp 120 240 Volt Circuit Breaker NIB
New Cutler Hammer CHB240 2 Pole 40 Amp 120 240 Volt Circuit Breaker NIB
$48.99
quality
LOT OF 3 Siemens Q240 40 Amp 2 Pole 240 Volt Circuit Breakers
LOT OF 3 Siemens Q240 40 Amp 2 Pole 240 Volt Circuit Breakers
$29.99
quality
Crouse Hinds MP340 3 Pole 40 Amp Circuit Breaker
Crouse Hinds MP340 3 Pole 40 Amp Circuit Breaker
$23.00
quality
SQUARE D QOB340 3 POLE 40 AMP 120 240 VOLT CIRCUIT BREAKER
SQUARE D QOB340 3 POLE 40 AMP 120 240 VOLT CIRCUIT BREAKER
$55.00
quality
General Electric GE THQB32040 Circuit Breaker 3 Pole 40 Amp 240 VAC
General Electric GE THQB32040 Circuit Breaker 3 Pole 40 Amp 240 VAC
$18.00
quality
New Murray MP240 40 Amp 2 Pole 240 Volt Circuit Breaker NEW OLD STOCK
New Murray MP240 40 Amp 2 Pole 240 Volt Circuit Breaker NEW OLD STOCK
$9.99
quality
Used Gould Ite Siemens ED43B040 40amp 480 volt 3 pole ED4 circuit breaker
Used Gould Ite Siemens ED43B040 40amp 480 volt 3 pole ED4 circuit breaker
$29.99
quality
Lot of 6 Aircraft 3 Phase Pole Circuit Breaker Klixon 40 amp 25 a 7 1 2 a 5 a
Lot of 6 Aircraft 3 Phase Pole Circuit Breaker Klixon 40 amp 25 a 7 1 2 a 5 a
$105.00
quality
Square D HJL HJ 060 3 pole 40 amp 600v HJL36040 PowerPact Circuit Breaker
Square D HJL HJ 060 3 pole 40 amp 600v HJL36040 PowerPact Circuit Breaker
$250.00
quality
New surplus Square D QOB340VH 3 pole bolt on QOB 40 Amp 22kA 240 volt breaker
New surplus Square D QOB340VH 3 pole bolt on QOB 40 Amp 22kA 240 volt breaker
$76.50
quality
I T E 3 POLE 40 AMP EQ B CIRCUIT BREAKER
I T E 3 POLE 40 AMP EQ B CIRCUIT BREAKER
$29.95
quality
Westinghouse EHD2040 40 Amp 480 Volt 2 Pole Circuit Breaker EHD 2040
Westinghouse EHD2040 40 Amp 480 Volt 2 Pole Circuit Breaker EHD 2040
$65.00
quality
Square D QO240 circuit breaker 2pole 40amp type snap in 1 year warranty
Square D QO240 circuit breaker 2pole 40amp type snap in 1 year warranty
$28.00
quality
NEW WESTINGHOUSE QBHW1040 40 AMP 1 POLE BOLT IN BREAKER
NEW WESTINGHOUSE QBHW1040 40 AMP 1 POLE BOLT IN BREAKER
$20.00
quality
GE TED134040 40 AMP 3 Pole 480 Volt Circuit Breaker
GE TED134040 40 AMP 3 Pole 480 Volt Circuit Breaker
$42.00
quality
GE THED136040 40 AMP 3 Pole 600 Volt Circuit Breaker
GE THED136040 40 AMP 3 Pole 600 Volt Circuit Breaker
$32.00
quality
GE THED124040 2 POLE 40 AMP 480V CIRCUIT BREAKER General Electric
GE THED124040 2 POLE 40 AMP 480V CIRCUIT BREAKER General Electric
$40.00
quality
Cutler Hammer EATON 40A Circuit Breaker Type BR240 2 Pole 240V TYPE C240 40AMP
Cutler Hammer EATON 40A Circuit Breaker Type BR240 2 Pole 240V TYPE C240 40AMP
$14.50
quality
Cutler Hammer BAB2040H 2 Pole 120 240v 40Amp Circuit Breaker
Cutler Hammer BAB2040H 2 Pole 120 240v 40Amp Circuit Breaker
$29.99
quality
AMERICAN 40 Amp 2 pole C240 GA 240 GA Circuit Breaker
AMERICAN 40 Amp 2 pole C240 GA 240 GA Circuit Breaker
$8.20
quality
Merlin Gerin 40 Amp Circuit Breaker NSC100N 40 Used 78135
Merlin Gerin 40 Amp Circuit Breaker NSC100N 40 Used 78135
$75.00
quality
ITE 40 amp circuit breaker used EQ P
ITE 40 amp circuit breaker used EQ P
$10.00
quality
Used Square D QOU340 40 amp 3 pole type QOU old style circuit breaker
Used Square D QOU340 40 amp 3 pole type QOU old style circuit breaker
$36.00
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
6 NEW CHALLENGER C240 2 POLE 40 AMP CIRCUIT BREAKERS
6 NEW CHALLENGER C240 2 POLE 40 AMP CIRCUIT BREAKERS
$33.99
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
$60.29
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
Federal Pacific Breaker 2 pole 40 amp thick
Federal Pacific Breaker 2 pole 40 amp thick
$7.00
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
General Electric 20 Amp Circuit Breaker 40C
General Electric 20 Amp Circuit Breaker 40C
$12.00
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 QO240 40A 40 amp 2 pole Type QO Circuit Breaker
SQUARE D QO240 40A 40 amp 2 pole Type QO Circuit Breaker
$10.00
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
3 POLE BRYANT Breaker 40 AMP
3 POLE BRYANT Breaker 40 AMP
$19.99
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
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
NEW EATON CROUSE HINDS MP140 CIRCUIT BREAKER 40AMP 1 POLE 120 240VAC
NEW EATON CROUSE HINDS MP140 CIRCUIT BREAKER 40AMP 1 POLE 120 240VAC
$5.00
quality
SIEMENS LGB3B040B 40 AMP CIRCUIT BREAKER NEW IN THE BOX WITH WARRANTY
SIEMENS LGB3B040B 40 AMP CIRCUIT BREAKER NEW IN THE BOX WITH WARRANTY
$300.00
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
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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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