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If you're on a budget like me, and haven't yet bought a printed copy of NEC 2008, hopefully you know about the free online edition: http://www.nfpa.org/onlinepreview/online_preview_document.asp?id=7008SB The awkward part, however, is that they won't let you save, search, or print; NFPA...

When over three wires from the same branch circuit are run in a conduit, NEC appears to require them to be derated just as if they were on separate circuits, all capable of carrying full current at the same time (310.15B2a). Is there a Code paragraph I’m missing? Because all these #12’s...

How do you estimate (or measure) torque on connector screws? Put another way: how do you teach an apprentice what the correct torque feels like? I discover I over-tightened some screws on the grounding bus bar of our panel; one #12 was crushed beyond flat. On the other hand, I'm going to be...

I discovered our old garage/rec-room subpanel is fed with 3-wire 220V (no ground), with N-G bonded locally. :eek: (This is an attached garage, soon to have a laundry.) If I'm reading the tables correctly, this 50A feed requires a #10 Cu grounding conductor to the service. Before talking to the...

I need to place some controls in the vicinity of our washing machine: switches, fan speed, and a 120V thermostat. Above the washer, heat from the appliances will affect the thermostat; below the level of the lid or hoses, I'm concerned about splashing; as controls move farther away to the...