Upgrading my electrical in a triplex . From adding neutrals And grounds and such. Do I need a separate ground from the service disconnect to the panel in my apartment or does the FMC runway handle that.
Your individual breaker panel is probably considered a sub-panel of the structure...if that is the case, you need a 4-wire cable: L1 L2 Neutral Ground to it. ANd, in that panel, the ground and neutral wires should be on their own buss. In a main panel, the ground and neutral are tied together, but that should be the only place where that's true in the structure.
Your individual breaker panel is probably considered a sub-panel of the structure...if that is the case, you need a 4-wire cable: L1 L2 Neutral Ground to it. ANd, in that panel, the ground and neutral wires should be on their own buss. In a main panel, the ground and neutral are tied together, but that should be the only place where that's true in the structure.
Your individual breaker panel is probably considered a sub-panel of the structure...if that is the case, you need a 4-wire cable: L1 L2 Neutral Ground to it. ANd, in that panel, the ground and neutral wires should be on their own buss. In a main panel, the ground and neutral are tied together, but that should be the only place where that's true in the structure.
What size is the panel's main breaker? Keep in mind, the ground lead should never have any current running through it unless there's a fault. It needs a low enough resistance to trip the breaker, but because that happens in no more than a few seconds, it doesn't need to be as large as the current carrying conductors since it won't heat up much in that few seconds. If you run a new cable rather than individual wires in a race or conduit, it will be sized properly for the current carrying leads. I'm sure there are charts out there...don't know off the top of my head.