as long as the phase conductors are on different "phases" it's fine. Recent code requires them to be on a double pole breaker though. I do it as much as possible in houses. It's easier to pull one three wire for two circuits, than 2 separate two wires.

Can a neutral wire be shared?

What is a multiwire branch circuit? A multiwire branch circuit is a branch circuit with a shared neutral. This means there are two or more ungrounded (hot) phase or system conductors with a voltage between them and a shared neutral.

Can I borrow a neutral from another circuit?

No, you can't steal a neutral wire from another circuit. Each neutral wire is the return for the corresponding hot. If you "steal" a neutral from another circuit you run the risk of overloading that neutral wire (overheat, fire risk). Another issue might arise if the circuit later becomes a GFCI.

Can a dedicated circuit share a neutral?

Moderator. A dedicated vs separate circuit is the argument-- As I seeit a dedicated circuit should not share a neutral and a separate circuit may share it.

Can receptacles share neutrals?

Yes. GFCI receptacles work fine supplied by a multi-wire circuit. GFCI circuit breakers have a separate terminal for the neutral wire which must be run with the hot wire.

The dangers of a share neutral

What does shared neutral mean?

A shared neutral is when more then one circuit uses the same neutral wire instead of its own wire for each circuit. If you are using a shared neutral the two breakers need to be on a common trip breaker or also known as a 2 pole breaker.

Can you put 2 neutral wires together in panel?

Bottom Line. Many homes have neutral bars that have too many neutral wires in one hole or slot. Generally this does not create a problem for the homeowner, however, it is an easy fix and most home inspectors recommend correcting the issue.

Can I pigtail a neutral wire?

When making a pigtail, choose a scrap of wire with insulation that is the same color as the circuit wires you are connecting: white pigtails when connecting to neutral wires, red or black when connecting to hot wires, green or bare copper when connecting to grounding wires.

Why are all neutrals tied together?

The neutrals were all tied together to make one group so it doesnt matter which one makes it to the switch.

What is a borrowed neutral?

A borrowed neutral is when you have two seperate circuits but you have taken the neutral from one circuit to supply the other with a neutral.

Can a neutral wire be overloaded?

Overloading Of The Grounded (Neutral) Conductor.

Failure to properly terminate the ungrounded (hot) conductors to separate phases could cause the grounded (neutral) conductor to become overloaded from excessive neutral current, and the insulation could be damaged or destroyed.

Are shared neutrals allowed by NEC?

Sharing neutral or yoke

The NEC does not define multiple circuits. However, relating to 210.7, it appears to mean more than one circuit, on separate phases and each with its own neutral. If the circuits were on the same phase, simultaneous disconnection in the panelboard would not be possible.

Why do I have 2 neutral wires?

There are two black and two white wires in an outlet box because the outlet is in the middle of a series circuit, accepting power from another source and sending it on. Two cables are hot wires, bringing the power in and carrying it onward to the next. Two cables are neutral and do the same.

Is pigtail wiring safe?

Pigtailing aluminum wiring is safe as long as proper terminals and connections are made – without damaging the wire – and with materials approved by the Canadian Electrical Code. Aluminum wiring pigtails approved by the Electrical Safety Authority are the most common solution for making aluminum wiring safe.

What does a dedicated neutral wire mean?

First and most importantly, the dedicated line ensures that no other loads share the same two power wires. Other loads, if connected, might draw currents that could cause voltage drops in the building wiring that supplies the critical load.

Are grounding pigtails safe?

In a system with metal boxes, the pigtail method is considered the most secure. In this arrangement both the receptacle and metal box are grounded.

Can you double up neutrals on a neutral bar?

“Double tapped neutral” is a slang term used when 2 neutral wires (the white wires) are terminated under the same screw on the neutral bus bar. This has been an unacceptable practice for many years for a couple of reasons.

Can you stack neutrals?

Furthermore, all neutral camps can be stacked indefinitely; as long as all the creeps have escaped the camp boundaries.

Can I add another neutral bar to a panel?

So the neutral bars have thermal considerations ground bars do not, as well as, you don't want current to normally be present on the panel chassis, which is grounded. So you cannot add additional neutral bars, but they provided enough neutral slots for your needs, so you are all set.

Can you share a neutral on an arc fault circuit breaker?

Can the AFCI with shared neutral be used for retrofit installations? Yes, for retrofit installation, GE AFCIs can be substituted for the existing thermal magnetic breakers without the need to sort out existing shared or mixed neutrals.

Can 2 circuits share a ground?

The code requires each branch circuit to have an equipment ground (either a wire, or conduit, or cable tray as in 250.120A), they can be shared when they are in the same raceway. If all the 20A circuits are in one raceway then you just need one ground.

Can 2 circuits share a breaker?

Yes, it's fine to combine circuits onto one breaker, at which point they become one circuit.

Can a GFCI plug share a neutral?

"The only way to use two GFCI receptacles to provide GFCI protection to more than two total receptacles on a shared-neutral circuit is to stop sharing the neutral after the GFCIs - by using two seperate 12/2's, or 12/2/2.