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3 phase panel double pole single throw breaker 2 wires from breaker going to lighted sign 120 volts each is this a 240 volt system or a 120 feeding 2 diff ballast in the sign?
Wiki User
∙ 14y ago
In a three phase panel a double pole single throw breaker is definatly putting out 220v as two separate 110v circuits that are out of phase with each other. So from one leg to the other its 220v and from either leg to ground its 110v.
By definition it is 220v but it could be used as separate 110v circuits as well. The only way to know how its actually being used would be to open up the sign and see if both circuits are tied into one ballast as 220v or if they split and go to differant ballasts then they are 110v circuits using a common disconnect means.
Being that either way both circuits terminate in the same area they technically both require a double pole single throw breaker.
Wiki User
∙ 14y ago
Wiki User
∙ 8y agoIf the supply panel is three phase then there will not be a voltage of 220 volts, it will be 208 volts. This type of distribution is used in commercial establishments. It is a three phase four wire distribution. Because the voltage is taken from a two pole breaker using only two conductors the ballast needs 208 volts to operate.
If the feeder used was a three wire feeder then the possibility of the the load being two individual 120 volt ballast would be feasible.
Usually in sign lighting all of the ballasts are parallel wire inside the sign using just one voltage feed.
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Sizing circuit breakers for motors falls into a different category. Because of the inrush of current when the motor is in the stopped position, the breaker has to be sized to allow for this. Breakers usually are 250% of the nameplate full load amp rating. The wires that feed the motor are sized to 125% of the full load amps of the motor.
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A single pole circuit breaker can protect one hot wire to a given load where as a two pole circuit breaker can protect two hot wires to a given load. In the North American system this would equate to 120 volts on a single pole circuit breaker and 240 volts on a two pole circuit breaker.
Two black wires to a single fuse or breaker lug is called?
This condition is commonly known as a "Double Tap", and is only permitted if the breaker specifically allows it. Some Square D breakers and possibly other manufacturers allow terminating two wires under the screw, and if the breaker allows it, it will be identified as such on the label. If your specific breakers do not allow two wires terminating under one screw, you will need to install another appropriately sized breaker for that circuit, assuming your panel has the space available for the additional breaker. As always, if you are in doubt about what to do, the best advice is to call a licensed electrician. Before you do any work yourself on electrical circuits, equipment or appliances, always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS.
What size breaker would you use on a washing machine circuit?
A Stadard washing machine uses a dedicated 15 Amp single pole breaker. Nothing else should be on the circuit.AnswerThe above answer applies to North America. In the UK, a washing machine is connected to the ring main system using a three-pin plug that requires a 13-A fuse.
What device should be used to protect a system from over voltage and power spikes caused by dramatic fluctuations in electrical power levels?
The device that you are looking for is called a surge suppressor. It is a small device that can be mounted in one of the knock out holes in the distribution panel. They are a four wire device. It should be connected across a common tie double pole breaker. The two black leads from the suppressor connect to each of the terminals of the two pole breaker. The third white lead connects to the neutral bar of the distribution panel. The forth green wire connects to the ground buss, (not to be confused with the neutral bus). With the breaker turned on it continuously monitors the voltage of the distribution panel and automatically sends power spikes to ground.
How do I wire a 220v ballast when it has only 1 wire labeled 220 when I have 2 wires coming off of my double leg breaker?
Your ballast should show two wires for supply side of ballast. Make sure that neither side of this is grounded to the light and connect the 220 V from your breaker to these two wires and then connect a ground to the chassis of the light from the panel.
What type of circuit has double 20amp breaker going to a separate box at that separate box there is a well pump with another 20amp breaker to that?
Sounds like a 240 volt sub panel feeding a well pump.
Is a double throw 15amp breaker the same as a 30 amp breaker amp?
You have a double pole breaker for 240Volt supply. The maximum current is 15 amp.
What's a double breaker 20 amps and 30 amps?
A double breaker is a breaker that has 2 switches on it. One of the switches is 20 amps and the other is 30 amps.
Does a double 50 amp breaker make a 100 amp?
No, a double pole 50 amp breaker protects a 240 volt supply at 50 amps. The number that is on the handle of the breaker is the amperage that the breaker will trip at if an overload occurs on the circuit.
Should you buy double pole breaker or single pole?
Use of a double pole breaker or a single pole breaker depends entirely on the application. If you don't know about the application, contact a qualified electrician in your area.
What size breaker should be used for a double oven?
50 amp breaker wired with AWG # 6 wire.
Where is the double-pole circuit breaker located?
before the load
Is it a fire hazard to double land wires on a breaker?
Yes!
Can a 220 VAC breaker be single pole or does it have to always be a double pole breaker?
U.S. 240 VAC breakers are always double pole since they are protecting two legs of the circuit.
Can a double pole circuit breaker be used for 2 different circuits I have a 20 amp double pole breaker want 2 circuits running 14 gauge wire?
can a 20 amp double pole circuit breaker be used for 2 different 120 v circuits using 14 - 2 wire
Can a double pole 20 amp breaker be used with 12-2 wire for a single 220 circuit?
The term "double pole" usually means a breaker with 2 handles that attaches in the space as a normal single pole breaker. If this is what you mean, no, you cannot. There is no potential, or voltage, between the wire terminals. If by "double pole" you mean what is usually called a 2-pole breaker, which is a breaker with 2 handles that attaches in the space of 2 single pole breakers, then yes, you can use this breaker and 12/2 wire to produce a 220v circuit.
