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On a three phase 4 wire panel board you can have 3 hot wires per neutral. The three hot wires have to be from each phase. You can not double up on a phase and a neutral. eg. L1 and L2 and L3 to one neutral. Other combinations, L1,L2, N - L2,L3,N - L3,L1,N. You can not use L1,L1,N - L2,L2,N - L3,L3,N.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoIf the multi-wire circuit is three-phase, one neutral can be run for every three phases (Black, red, blue, or brown, orange, yellow.) if it's single phase, 240 volt. (black red), a neutral needs to be run for each two hot wires. You cannot use two wires of the same phase to get three hot wires. (like using two reds, a black, and a blue.) in that case, two neutrals will need to be run. Also, some circuitsrequire a separate neutral to be run for each "hot" wire regardless of the phase. This happens a lot in lighting circuits where all fixtures use electronic ballasts. Computer circuits also frequently need separate neutrals run.
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How many ground wire for a multi wire circuit?
One
What happen if fuse is connected to neutral wire?
The fuse will be blown off in case of any fault. But the circuit will not be isolated because of the presence of fuse in nutral line. current will still flow and the line will be so dangerous.
Does the neutral wire size and the hot wire size have to be the same on a 120v 208v bank?
If the load is perfectly planned AND purely resistive the neutral current would be zero in a 3-phase 4 wire circuit. But that is extremely rare. Before nonlinear loads (fluorescent lighting, computers, dimmers, variable speed drives etc) 1/2 size neutrals were often used but now full size neutrals are used to cope with the increasing levels of 3rd harmonics resulting from modern equipment, which can lead to neutral currents approaching or even exceeding the phase current. With very high levels or harmonics, double size neutrals are being used in places
Can work wire for 100 amps use for 60 amps circuit?
If you have 100 amp wire, you can use it for a 60 amp circuit, or for any circuit of 100 amps or less. But if you have a 60 amp circuit, 60 amp wire is thinner and cheaper than 100 amp wire.
What wire in a circuit should contain the fuse?
The live wire
How many ground wire for a multi wire circuit?
One
What happen if fuse is connected to neutral wire?
The fuse will be blown off in case of any fault. But the circuit will not be isolated because of the presence of fuse in nutral line. current will still flow and the line will be so dangerous.
Does the neutral wire size and the hot wire size have to be the same on a 120v 208v bank?
If the load is perfectly planned AND purely resistive the neutral current would be zero in a 3-phase 4 wire circuit. But that is extremely rare. Before nonlinear loads (fluorescent lighting, computers, dimmers, variable speed drives etc) 1/2 size neutrals were often used but now full size neutrals are used to cope with the increasing levels of 3rd harmonics resulting from modern equipment, which can lead to neutral currents approaching or even exceeding the phase current. With very high levels or harmonics, double size neutrals are being used in places
Another name of multi strand wire?
Another name that can be used for a multi-strand wire is a cable.
Can one use 1 circuit of a 3 wire plus ground 2 circuit cable as a GFI circuit with the other as a lighting circuit?
A GFCI can not be used on a three wire branch circuit. It has to be on a single two wire circuit.
Where does the wire come from in an electrical circuit?
The wire comes from the installer or manufacturer of the circuit.
How do you change wire fuse for circuit breaker?
A circuit breaker does not have a wire fuse in it.
What job does a wire do in a circuit?
The wire in a circuit helps to pass power to the electrical appliances.
Can you install a GFCI on a 2 wire circuit?
Yes, you install a GFCI on a 2 wire circuit.
How many neutral wires are needed for lighting and outlets?
If they are on the same circuit you only need 1 neutral wire in the circuit.
What size amp circuit breaker should be used for a geyser?
Depends on how many amps it pulls and the size of the wire in the circuit.
Can work wire for 100 amps use for 60 amps circuit?
If you have 100 amp wire, you can use it for a 60 amp circuit, or for any circuit of 100 amps or less. But if you have a 60 amp circuit, 60 amp wire is thinner and cheaper than 100 amp wire.
