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7

If the main breaker was on this would be expected if you put the breaker (in its on position) in before connecting the neutral and there was something turned on in the branch you were connecting. If something is drawing on a circuit there is going to be current flowing back through the neutral - that is what the neutral is for. It completes the circuit from ...


3

This has happened to me. You may have just manually tripped the breakers when you were putting the cover back on. It doesn't take much force to trip the breaker. It's unlikely that an electrical mis-wiring caused this, because each side of the box is fed alternatively by both of "hot" feed. Say you have split phase 1 and 2. The left side of your box ...


3

There is no problem with installing junction boxes above a suspended ceiling, as long as the box is less than 100 in.³ and securely fastened. National Electrical Code has this to say... National Electrical Code 2014 Chapter 3 Wiring Methods and Materials Article 314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and ...


3

You are on the right track. Junction boxes, with blank covers are allowed above a suspended ceiling as it is not considered a closed space. The wires that are loose and wirenuted need to be put in a j-box. Also, clamps need to be used at each wire going into a j-box. Some boxes have clamps pre-installed, if not, you need to use a RX connector in the ...


2

Often, electricians used ordinary black/red/green twin&earth for C but marked the black wire with red tape (to indicate "switched live") You seem to have something nonstandard, perhaps a spur (therefore missing B) without an earth to the switch? You'll have to use appropriate methods to determine what is what. See answer to similar old question ...


2

There is no such thing as BX cable. Are you working with Type AC cable (armored cable), or Type MC cable (metal-clad cable)? Metal-Clad Cable (Type MC) Type MC cable has a grounding conductor, and the sheath cannot be used as a grounding conductor. If you're working with MC cable, it's not likely any fault condition could lead to the ducting becoming ...


1

Whoever told you the meter was the point of disconnect was dead wrong. The main panel or disconnect is the first means of overcurrent or disconnect. THIS is where your neutral bond must happen. 2011 NEC Article 250 Grounding and Bonding II. System Grounding 250.24 Grounding Service-Supplied Alternating-Current Systems (B) Main ...


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The grounded (neutral) conductor is bonded to ground in one location. It's common to bond the grounded (neutral) bus and the grounding bus in the panel, but it's not a requirement. The grounded (neutral) conductor can be bonded before the panel, but you'd then be required to keep the grounding and grounded (neutral) conductors separate after that point. So ...


1

Wiring colour conventions can vary worldwide, so as you don't state where you are located, it's not possible to give a definitive answer. In the UK for example (for single phase wiring), convention would have the live wire as brown (new colour) or red (old colour) and the neutral wire as blue (new colour) or black (old colour). It was not uncommon to see ...



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