40 Amp

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SQUARE D QO QO240 2 Pole 40 Amp Circuit Breaker LONG STAB Flawed
SQUARE D QO QO240 2 Pole 40 Amp Circuit Breaker LONG STAB Flawed
$7.00
quality
NEW Square D FH FH36040 40 amp 3 pole 600 volt Circuit Breaker Green Label
NEW Square D FH FH36040 40 amp 3 pole 600 volt Circuit Breaker Green Label
$225.00
quality
Circuit Breaker 40 AMP FPE Type NA Stab Lok 120 240 VAC
Circuit Breaker 40 AMP FPE Type NA Stab Lok 120 240 VAC
$10.00
quality
cutler hammer ghb ghb3040s1 3 pole 40 amp shunt trip Circuit breaker
cutler hammer ghb ghb3040s1 3 pole 40 amp shunt trip Circuit breaker
$250.00
quality
GE 60 AMP CIRCUIT BREAKER SELA36AI0060 3 POLE 600 VAC 40 AMP RATING PLUG SRPE60A
GE 60 AMP CIRCUIT BREAKER SELA36AI0060 3 POLE 600 VAC 40 AMP RATING PLUG SRPE60A
$124.99
quality
NEW Square D FA FA34040 3 POLE 40 AMP 480V CIRCUIT BREAKER
NEW Square D FA FA34040 3 POLE 40 AMP 480V CIRCUIT BREAKER
$215.00
quality
WESTINGHOUSE 40 AMP 3 POLE CIRCUIT BREAKER QBHW3040HYA 605
WESTINGHOUSE 40 AMP 3 POLE CIRCUIT BREAKER QBHW3040HYA 605
$32.00
quality
Cutler Hammer Westinghouse GHB GHB3040 3 pole 40 amp Circuit Breaker Flawed
Cutler Hammer Westinghouse GHB GHB3040 3 pole 40 amp Circuit Breaker Flawed
$70.00
quality
SQUARE D CIRCUIT BREAKER 40 AMP 480V 3 POLE EGB34040
SQUARE D CIRCUIT BREAKER 40 AMP 480V 3 POLE EGB34040
$160.00
quality
GENERAL ELECTRIC 40 AMP 3 POLE BREAKER TQL32040   YA 212
GENERAL ELECTRIC 40 AMP 3 POLE BREAKER TQL32040 YA 212
$21.25
quality
THQC1140 General Electric GE Type THQC Circuit Breaker 1 Pole 40 Amp 240V
THQC1140 General Electric GE Type THQC Circuit Breaker 1 Pole 40 Amp 240V
$13.99
quality
SQUARE D FAL34040 MOLDED CASE CIRCUIT BREAKER 40 AMP
SQUARE D FAL34040 MOLDED CASE CIRCUIT BREAKER 40 AMP
$96.96
quality
Used Schurter AS168X CB2 2 Pole 40 Amp DG400 Circuit Breaker
Used Schurter AS168X CB2 2 Pole 40 Amp DG400 Circuit Breaker
$15.00
quality
AIRPAX IEG6 1 53 400 A 01 V CIRCUIT BREAKER 40 AMP
AIRPAX IEG6 1 53 400 A 01 V CIRCUIT BREAKER 40 AMP
$6.99
quality
Used ABB S282UCK40A 2 Pole 40 Amp 240 480V Circuit Breaker Asea Brown Boveri
Used ABB S282UCK40A 2 Pole 40 Amp 240 480V Circuit Breaker Asea Brown Boveri
$22.00
quality
GE TE132040 circuit breaker 3pole 40amp 240v 1 year warranty obsolete TEI32040
GE TE132040 circuit breaker 3pole 40amp 240v 1 year warranty obsolete TEI32040
$125.00
quality
CUTLER HAMMER EHD3040 40 AMP 480 VOLT 3 POLE CIRCUIT BREAKER SES
CUTLER HAMMER EHD3040 40 AMP 480 VOLT 3 POLE CIRCUIT BREAKER SES
$148.15
quality
QZD38140 CBI CIRCUIT BREAKER 3 POLE CURVE D 40 AMP
QZD38140 CBI CIRCUIT BREAKER 3 POLE CURVE D 40 AMP
$57.91
quality
1 FPE NA NA140 40 AMP 1 POLE 120 240 VAC CIRCUIT BREAKER
1 FPE NA NA140 40 AMP 1 POLE 120 240 VAC CIRCUIT BREAKER
$4.50
quality
CUTLER HAMMER FD2040 40 AMP 600 VOLT 2 POLE CIRCUIT BREAKER SES
CUTLER HAMMER FD2040 40 AMP 600 VOLT 2 POLE CIRCUIT BREAKER SES
$320.15
quality
QZD38240 CBI CIRCUIT BREAKER 3 POLE CURVE C 40 AMP
QZD38240 CBI CIRCUIT BREAKER 3 POLE CURVE C 40 AMP
$57.91
quality
1 ITE I T E BQH BQ3B040H 40 AMP 3 POLE 240 VAC CIRCUIT BREAKER
1 ITE I T E BQH BQ3B040H 40 AMP 3 POLE 240 VAC CIRCUIT BREAKER
$59.50
quality
ESF GN3B040 Soprano 3 Pole 40 Amps 240 Volts Circuit Breaker
ESF GN3B040 Soprano 3 Pole 40 Amps 240 Volts Circuit Breaker
$195.95
quality
NEW ARROW HART MURRAY CIRCUIT BREAKER 40 AMP 1 POLE MP140
NEW ARROW HART MURRAY CIRCUIT BREAKER 40 AMP 1 POLE MP140
$5.65
quality
Square D FAL36040 40 Amp 600V 3Pole Circuit Breaker
Square D FAL36040 40 Amp 600V 3Pole Circuit Breaker
$54.99
quality
NEW ITE BL B140 40 amp 1 pole Circuit Breaker
NEW ITE BL B140 40 amp 1 pole Circuit Breaker
$6.99
quality
SIEMENS BLH CIRCUIT BREAKER B340H 40AMP 240VOLT 3POLE
SIEMENS BLH CIRCUIT BREAKER B340H 40AMP 240VOLT 3POLE
$44.99
quality
CUTLER HAMMER FDB3040 40 AMP 600 VOLT 3 POLE CIRCUIT BREAKER SES
CUTLER HAMMER FDB3040 40 AMP 600 VOLT 3 POLE CIRCUIT BREAKER SES
$143.15
quality
USED Siemens E43B040 Circuit Breaker 3 pole 40 amp
USED Siemens E43B040 Circuit Breaker 3 pole 40 amp
$55.00
quality
NEW CUTLER HAMMER FDB3040 40 AMP 600 VOLT 3 POLE CIRCUIT BREAKER SES
NEW CUTLER HAMMER FDB3040 40 AMP 600 VOLT 3 POLE CIRCUIT BREAKER SES
$234.15
quality
Lot of 7 SQUARE D CIRCUIT BREAKER 220AMP 340AMP 250AMP 120 240V 40C
Lot of 7 SQUARE D CIRCUIT BREAKER 220AMP 340AMP 250AMP 120 240V 40C
$27.00
quality
CUTLER HAMMER BR CIRCUIT BREAKER BR240 40AMP 240VOLT 2POLE
CUTLER HAMMER BR CIRCUIT BREAKER BR240 40AMP 240VOLT 2POLE
$7.99
quality
NEW ALTECH C40 2 POLE CIRCUIT BREAKER 40 AMP 480 VAC 5 AVAILABLE
NEW ALTECH C40 2 POLE CIRCUIT BREAKER 40 AMP 480 VAC 5 AVAILABLE
$24.99
quality
SIEMENS QP CIRCUIT BREAKER Q34000S01 40AMP 240VOLT 3POLE W SHUNT
SIEMENS QP CIRCUIT BREAKER Q34000S01 40AMP 240VOLT 3POLE W SHUNT
$59.99
quality
SQUARE D I LINE FH CIRCUIT BREAKER FH36040 40AMP 600VOLT 3POLE BLACK
SQUARE D I LINE FH CIRCUIT BREAKER FH36040 40AMP 600VOLT 3POLE BLACK
$29.99
quality
THQC32040WL General Electric GE Type THQC Circuit Breaker 3 Pole 40 Amp 240V
THQC32040WL General Electric GE Type THQC Circuit Breaker 3 Pole 40 Amp 240V
$49.99
quality
New Siemens ED21B040L 1 pole 40 amp 120 volt ED Circuit Breaker
New Siemens ED21B040L 1 pole 40 amp 120 volt ED Circuit Breaker
$60.38
quality
Surplus Siemens ED21B040L 1 pole 40 amp 120 volt ED Circuit Breaker
Surplus Siemens ED21B040L 1 pole 40 amp 120 volt ED Circuit Breaker
$55.20
quality
SQUARE D QOB CIRCUIT BREAKER QOB240 40AMP 240VOLT 2POLE 10kA
SQUARE D QOB CIRCUIT BREAKER QOB240 40AMP 240VOLT 2POLE 10kA
$7.99
quality
Cutler Hammer Eaton BR340 3 pole 40 amp 120 240V Circuit Breaker
Cutler Hammer Eaton BR340 3 pole 40 amp 120 240V Circuit Breaker
$30.00
quality
ABB S3N SACE S3 40 Amp Type HACR 3 Pole 40A Breaker 600V S3N040
ABB S3N SACE S3 40 Amp Type HACR 3 Pole 40A Breaker 600V S3N040
$139.00
quality
NEW CUTLER HAMMER FW3040L 40 AMP 600 VOLT 3 POLE CIRCUIT BREAKER SES
NEW CUTLER HAMMER FW3040L 40 AMP 600 VOLT 3 POLE CIRCUIT BREAKER SES
$1,113.15
quality
SIEMENS QP CIRCUIT BREAKER Q240 40AMP 240VOLT 2POLE
SIEMENS QP CIRCUIT BREAKER Q240 40AMP 240VOLT 2POLE
$9.99
quality
new old GE E 11592 HCAR 3 PH ZZ7359 40 AMP cIRCuit Breaker GENERAL ELECTRIC FG
new old GE E 11592 HCAR 3 PH ZZ7359 40 AMP cIRCuit Breaker GENERAL ELECTRIC FG
$99.00
quality
GE THQL CIRCUIT BREAKER THQL1140 40AMP 240VOLT 1POLE
GE THQL CIRCUIT BREAKER THQL1140 40AMP 240VOLT 1POLE
$4.99
quality
Westinghouse FDB3040 Circuit Breaker 40 Amp 600 V 3 Pole
Westinghouse FDB3040 Circuit Breaker 40 Amp 600 V 3 Pole
$95.00
quality
NEW 3000 Amps Siemens 38 3AH3 40 3000 104 Vacuum Circuit Breaker 38 kV
NEW 3000 Amps Siemens 38 3AH3 40 3000 104 Vacuum Circuit Breaker 38 kV
$21,000.00
quality
Siemens 2 Pole 40 Amp and 2 Pole 40 Amp Quad Circuit Breaker Cat Q24030
Siemens 2 Pole 40 Amp and 2 Pole 40 Amp Quad Circuit Breaker Cat Q24030
$30.00
quality
NEW 1200 Amps Siemens 38 3AH3 40 1200 104 Vacuum Circuit Breaker 38 kV
NEW 1200 Amps Siemens 38 3AH3 40 1200 104 Vacuum Circuit Breaker 38 kV
$17,000.00
quality
GE 2 Pole Circuit Breaker 40 Amp E 11592 RT 690 Type THQB Used
GE 2 Pole Circuit Breaker 40 Amp E 11592 RT 690 Type THQB Used
$5.99
quality
NIB Siemens NGB3B040B Circuit Breaker 40 Amp 3 pole 50 60Hz
NIB Siemens NGB3B040B Circuit Breaker 40 Amp 3 pole 50 60Hz
$95.00
quality
Siemens Q240 40 amp circuit breakers 2 pole 120 240V 60Hz Type QP
Siemens Q240 40 amp circuit breakers 2 pole 120 240V 60Hz Type QP
$60.00
quality
1 NIB SIEMENS 5SJ4 140 8HG41 5SJ41408HG41 MINIATURE CIRCUIT BREAKER 40 AMP 1 P
1 NIB SIEMENS 5SJ4 140 8HG41 5SJ41408HG41 MINIATURE CIRCUIT BREAKER 40 AMP 1 P
$29.50
quality
Cutler Hammer GHB3040 circuit breaker 3pole 40amp 480v GHB warranty
Cutler Hammer GHB3040 circuit breaker 3pole 40amp 480v GHB warranty
$75.00
quality
Siemens 1 Pole 40 Amp 120 Volt Circuit Breaker Cat BQ140
Siemens 1 Pole 40 Amp 120 Volt Circuit Breaker Cat BQ140
$45.00
quality
SQUARE D CIRCUIT BREAKER 40 AMP 480V 3 POLE EGB34040
SQUARE D CIRCUIT BREAKER 40 AMP 480V 3 POLE EGB34040
$160.00
quality
GE TQB32040 TQB 3 Pole 40 Amp 240 Volt Circuit Breaker
GE TQB32040 TQB 3 Pole 40 Amp 240 Volt Circuit Breaker
$0.99
quality
Sprecher Schuh LA3 40 1753 40 Amp Breter Load Switch LA 3 40 1753 LA3401753
Sprecher Schuh LA3 40 1753 40 Amp Breter Load Switch LA 3 40 1753 LA3401753
$44.99
quality
CUTLER HAMMER HFD3040 40 AMP 3 POLE AC CIRCUIT BREAKER SES
CUTLER HAMMER HFD3040 40 AMP 3 POLE AC CIRCUIT BREAKER SES
$300.13
quality
Square D 2 Pole 40 Amp 240 Volt Circuit Breaker Cat HOM240
Square D 2 Pole 40 Amp 240 Volt Circuit Breaker Cat HOM240
$10.00
quality
GE THQC 2 POLE 40 AMP DIN RAIL CIRCUIT BREAKER 120V 240V THQC2140WL
GE THQC 2 POLE 40 AMP DIN RAIL CIRCUIT BREAKER 120V 240V THQC2140WL
$25.00
quality
ITE Siemens 2 Pole 40 Amp 240 Volt Circuit Breaker Cat EQ 2140
ITE Siemens 2 Pole 40 Amp 240 Volt Circuit Breaker Cat EQ 2140
$65.00
quality
Used Siemens ITE ED41B040 40 amp 1 pole 480 volt Circuit Breaker
Used Siemens ITE ED41B040 40 amp 1 pole 480 volt Circuit Breaker
$64.12
quality
Cutler Hammer BAB3040H 40 AMP 3 POLE Circuit Breaker WARRANTY
Cutler Hammer BAB3040H 40 AMP 3 POLE Circuit Breaker WARRANTY
$35.00
quality
Square D EHB34040 3 Pole 40 Amp Breaker
Square D EHB34040 3 Pole 40 Amp Breaker
$350.00
quality
GE WavePro 4000 Amp WPS 40 Circuit Breaker E O or M O D O
GE WavePro 4000 Amp WPS 40 Circuit Breaker E O or M O D O
$9,500.00
quality
WADSWORTH 40 AMP 1 POLE CIRCUIT BREAKER PLUG IN TYPE YI 901A
WADSWORTH 40 AMP 1 POLE CIRCUIT BREAKER PLUG IN TYPE YI 901A
$9.95
quality
Westinghouse Circuit Breaker EHB3040  40 amp  3 pole  480 vac
Westinghouse Circuit Breaker EHB3040 40 amp 3 pole 480 vac
$45.00
quality
Square D QOB240 2 Pole 40 Amp Circuit Breaker
Square D QOB240 2 Pole 40 Amp Circuit Breaker
$18.00
quality
Allen Bradley Circuit Breaker Trip Unit 140U KTD3 D30 300 Amps In 40 Deg C
Allen Bradley Circuit Breaker Trip Unit 140U KTD3 D30 300 Amps In 40 Deg C
$69.99
quality
EATON Cutler Hammer FS 3 POLE 40 AMP 480v FS340040A CIRCUIT BREAKER F Frame
EATON Cutler Hammer FS 3 POLE 40 AMP 480v FS340040A CIRCUIT BREAKER F Frame
$140.00
quality
ITE 40 AMP 3 POLE CIRCUIT BREAKER Q340  VS 607
ITE 40 AMP 3 POLE CIRCUIT BREAKER Q340 VS 607
$17.50
quality
Altech 40 Amp 480V 2 Pole Clip In Breaker On 40A Din Merlin Gerin 2DU40R 2CU40R
Altech 40 Amp 480V 2 Pole Clip In Breaker On 40A Din Merlin Gerin 2DU40R 2CU40R
$110.00
quality
GE TED124040 40 amp 2 pole 480 volt circuit Breaker black
GE TED124040 40 amp 2 pole 480 volt circuit Breaker black
$15.00
quality
WESTINGHOUSE 40 AMP BREAKER CAT  FD3040  07981
WESTINGHOUSE 40 AMP BREAKER CAT FD3040 07981
$29.99
quality
Siemens BE240 BLE 40 Amp 2 Pole Cir Breaker w Equip Ground Fault Protection
Siemens BE240 BLE 40 Amp 2 Pole Cir Breaker w Equip Ground Fault Protection
$125.00
quality
GE THQP240 Circuit Breaker 40 Amp 120 240 Volt 2 Pole
GE THQP240 Circuit Breaker 40 Amp 120 240 Volt 2 Pole
$5.00
quality
USED Square D FHB36040 I Line Circuit Breaker 40 Amps 600VAC
USED Square D FHB36040 I Line Circuit Breaker 40 Amps 600VAC
$90.00
quality
SQUARE D Circuit Breaker 40Amp FAL34040 480V
SQUARE D Circuit Breaker 40Amp FAL34040 480V
$65.00
quality
GE 40A 3P THED136040 40 AMPS 3 POLES BREAKER UNUSED 600VAC
GE 40A 3P THED136040 40 AMPS 3 POLES BREAKER UNUSED 600VAC
$50.00
quality
CUTLER HAMMER QC2040 2POLE 40AMP 240V LINE LOAD BREAKER
CUTLER HAMMER QC2040 2POLE 40AMP 240V LINE LOAD BREAKER
$22.50
quality
GE THQL 40 amp 1 pole circuit breaker with 24 48v shunt trip free shipping
GE THQL 40 amp 1 pole circuit breaker with 24 48v shunt trip free shipping
$24.99
quality
SQUARE D FCB34040 3 POLE 40 AMP 480 240 I LINE THERMAL MAGNETIC CIRCUIT BREAKER
SQUARE D FCB34040 3 POLE 40 AMP 480 240 I LINE THERMAL MAGNETIC CIRCUIT BREAKER
$128.85
quality
Square D QOB240 Two pole 40 Amp Bolt On Circuit Breaker
Square D QOB240 Two pole 40 Amp Bolt On Circuit Breaker
$5.00
quality
Fuji Circuit Breaker 3 Pole BU ESB3040 40Amp 600V
Fuji Circuit Breaker 3 Pole BU ESB3040 40Amp 600V
$124.99
quality
SIEMENS ITE Q340 NEW PLUG IN CIRCUIT BREAKER 3 POLE 40 AMP 120 VAC
SIEMENS ITE Q340 NEW PLUG IN CIRCUIT BREAKER 3 POLE 40 AMP 120 VAC
$42.99
quality
1 pc GE TEY340 Circuit Breaker 3 Pole 40 Amp Used
1 pc GE TEY340 Circuit Breaker 3 Pole 40 Amp Used
$45.00
quality
Used Siemens ITE ED42B040 2 pole 40 Amp 480 V Circuit Breaker
Used Siemens ITE ED42B040 2 pole 40 Amp 480 V Circuit Breaker
$195.44
quality
New Siemens Gould ITE ED42B040L 2 Pole 40 Amp 480V Breaker
New Siemens Gould ITE ED42B040L 2 Pole 40 Amp 480V Breaker
$244.30
quality
Surplus Panel Pullout Siemens Gould ITE ED42B040 2 Pole 40 Amp 480V Breaker
Surplus Panel Pullout Siemens Gould ITE ED42B040 2 Pole 40 Amp 480V Breaker
$223.36
quality
5 NIB SQUARE D HOM HOM240 HOM240CP CIRCUIT BREAKER 40A 40 AMP 2P 240V BOX OF 5
5 NIB SQUARE D HOM HOM240 HOM240CP CIRCUIT BREAKER 40A 40 AMP 2P 240V BOX OF 5
$39.50
quality
Siemens HHED43B040 ITE 3 pole 40 amp 480V
Siemens HHED43B040 ITE 3 pole 40 amp 480V
$250.00
quality
SQUARE D 40 AMP 2 POLE CIRCUIT BREAKER FA26040BC  D 04D
SQUARE D 40 AMP 2 POLE CIRCUIT BREAKER FA26040BC D 04D
$139.00
quality
SQUARE D TYPE FCL FCP34040 3 POLE 40 AMP CIRCUIT BREAKER  UB 64
SQUARE D TYPE FCL FCP34040 3 POLE 40 AMP CIRCUIT BREAKER UB 64
$85.50
quality
1 NEW SQUARE D HOM HOM240 CIRCUIT BREAKER 40A 40 AMP 2P 2 POLE 240V 240 VOLT
1 NEW SQUARE D HOM HOM240 CIRCUIT BREAKER 40A 40 AMP 2P 2 POLE 240V 240 VOLT
$7.50
quality
QO240 Square D SQD Type QO Circuit Breaker 2 Pole 40 Amp 240V
QO240 Square D SQD Type QO Circuit Breaker 2 Pole 40 Amp 240V
$20.99
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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