0
What else can I help you with?
Can you use 70amp breaker for 40amp device?
The purpose of a circuit breaker in a panel is to protect the wiring and devices like switches, outlets and other devices that are part of that circuit. It isn't unusual to plug in an appliance into a circuit whose amperage rating is less than the breaker protection. If such an appliance doesn't have its own over-current protection it may well "fry" in an over current situation. However, if your 40 Amp device is directly connect to the 70 A circuit and has no over-current protection on its own you are risking a serious problem. If your 40 A device is on this dedicated circuit you should protect it with a properly sized breaker.
Can you use a 40amp breaker on your 220v welder with 12-3 wire?
NO! If you're running a 40 amp circuit you must use 8AWG wire. If you attempt to use anything smaller you run a significant risk of burning your house down. If you are unfamiliar with wiring regulations and practices, contact a qualified electrician to wire the circuit for you.
Can you take a 240v 20a garage outlet number 12 with 4 wires and split it into two 120v circuits while still keeping the 240v outlet?
for USA, Canada and countries using similar 60Hz mains suppliesI'm not sure if the National Electrical Code is okay with it, but it is possible. Make sure you have a 20 Amp Double Pole breaker in the panel. Then, at the 240V outlet: You may need more room to accomodate all the wiring, so get a box extension, or if possible, upgrade to a larger box or use a junction box before the 240V outlet. Okay, Take the incoming neutral wire and connect it to the 2 120V circuits and to the 240V outlet. Connect the incoming red hot wire to a black 120V hot wire. Connect the 240V Black hot wire to the other 120V's hot wire. Connect all the ground wires together. Make sure that the box is grounded as well. Here's a simple formula for calculating the current you can use. Remember that the 120V circuits take current from one leg or the other, while the 240V Circuit takes from both. Since you have 2 120V 20A circuits, multiply the amps of the equipment you can use by 1. Now, multiply the 240V equipment's amps by 2. Add the values together. The value should be less than 32, and definitely not higher than 40. I recommend installing a 120/240V twistlok plug in the box. Then you can plug whatever you want into it. I made a nice distribution panel with 15A breakers for when I want 120V, and 240 can plug in directly. ( I use this method to power my Christmas lights. 2kW. :P)IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.If you do this work yourself, always turn off the powerat the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicator to insure the circuit is, in fact, de-energized.If there are only 3 wires entering the box, you can't legally do it. You can not use the same wire for a neutral and a protective ground. The 3 wires are the two hot phases and the protective ground.If there are 4 wires in the box, or if metal conduit provides the protective ground in addition to 3 wires, you can do it, provided the breaker is a double pole breaker. The white wire is the neutral, the bare one is the protective ground
What size breaker to use on a 4500 watt water heater?
Divide your wattage by your voltage to get your amperage.4500/240=18.75 Amps12ga. wire "can" handle 20amps, however, You should only load a wire to 75% it's max. You are beyond 15amps, so 10ga. would be a good idea, and may be required by your local building codes. Remember, in a brownout (voltage drop) the amp draw will go up. You want to keep below 75% load to allow for this.On 12ga. wire you would be at 93.75% of it's 20amp rating. (Dangerous)On 10ga. wire you would be at 62.5% of it's 30amp rating. (Safe)On 8ga. wire you would be at 46.875% of it's 40amp rating. (Overkill)If you use 8ga., make sure the conductors will actually fit into the terminals on your breaker.If you house doesn't have true 120v/240v power, the amperage will be higher. For example, if you power is actuall comming in at 110v/220v, the ater heater will draw 20.45amps. This would exceed the rating of the 12ga. wire, and raise the load on the 10ga. and 8ga. to 68.16% and 51.12% respectively.Regardless of the wire size you choose, use a 20amp breaker (25amp if you voltage is less than 240). If the water heater draws more than 20amps, you could have a problem. The wire is not the only thing that can burn your house down.Correction to above. If voltage decreases in a resistive circuit, wattage will go down, as will current draw. Resistance stays the same.
Can you run 8 gauge wire on a 50 amp breaker?
6ga should be used. It might not be against codes where you are,and you might have a 50amp installed for something that only uses 40amp, but it should be done right, and 6ga should be used off of a 50amp breaker.
Why does the 40amp fuse keep blowing in your 1986 Toyota truck?
Short in the wiring or the circuit is overloaded.
I am wondering on 120v lines you have 1 Breakers and on 240v you have dual brakers my question is these breakers have a rating on each side say 20amps does that mean these are 40amp fuses?
No. 240V circuits using three wires normally have 120 volts on each of two legs and a common ground/return leg. Measuring across the two hot legs gives the 240 volts. Each of the hot legs has its own circuit breaker. Two breakers are protecting two separate hot legs. If each breaker is rated as 20 amps, then 20 amps is the maximum for EACH leg. It is not a 40 amp circuit. be careful if you start messing around with household electricity.... ;-)
1997 jeep tj 40amp maxi fuse for starting circuit keeps blowingreplace fuse starts again but will blow at anytime again have had starter replaced?
Worn or frayed wire to starter?
What is a 30 amp circuit breaker used for?
A 30 amp circuit breaker is needed unless the load is a motor circuit, then it has to be sized to 250 percent of the motors full load amps. For 30A circuit is needed breaker 30*1.25=37.5 --> 40A. If load is lamp or heater, then use breaker of group A or B. If load is motor, then use breaker of groupC or D (very hard start) or special safe breaker for motor - with variable amp setpoint. See related link also. By code you are only allowed 80% of the rating of a breaker. So 30x80%=24amps. 24 amps is the MAX allowed on a 30 amp breaker. You would need a 40amp breaker for a 30 amp circuit. 40x80%=32. So you would want a double pole 40amp breaker.
Can you use a 230v saw on a 40amp circuit?
Possibly, most 230 volt saws draw about 16-18 amps on each line. There will be a spec plate on or by the motor which has the amp draw marked. CHECK this first.
Does a 40amp charger charge at less than 40amp?
The forty amp charger will supply up to a maximum of 40 amps. Normally it will provide less based on the charge state of the battery
Can you use 70amp breaker for 40amp device?
The purpose of a circuit breaker in a panel is to protect the wiring and devices like switches, outlets and other devices that are part of that circuit. It isn't unusual to plug in an appliance into a circuit whose amperage rating is less than the breaker protection. If such an appliance doesn't have its own over-current protection it may well "fry" in an over current situation. However, if your 40 Amp device is directly connect to the 70 A circuit and has no over-current protection on its own you are risking a serious problem. If your 40 A device is on this dedicated circuit you should protect it with a properly sized breaker.
Where are fuses for hatch Chrysler pacifica?
The fuse box is under the hood, and the hatch is #11 - 40amp.
Where is the ac fuse on a 90 Celica?
Passenger side kick panel. There is a small 10amp and a 40amp both are for the AC.
What would cause a 40amp ignition batt fuse to blow on a 97 Malibu?
There is a sort somewhere in the starting system
Where are the fuses for your headlights in a 1999 Mitsubishi Eclipse?
In the underhood fuse box, green fuse with a see through top (40amp)
Can you run 3 1000watt metal halide lamps off of a single pole 40amp breaker?
Current is power divided by voltage. If you are in the part of the world that uses 110-V AC... 3000 W ÷ 110 V = 27.3 A That's only 68% of 40 A; you should have no problem assuming you have no other heavy loads on the circuit.
