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Q: I know that knob-and-tube wiring can't be covered with insulation, but what about BX cable and joist-mounted junction boxes? Are there any restrictions on blowing cellulose insulation into an attic and burying the cable and junction boxes?
Three-way outlet; rotary dimmer; wireless smoke alarm; finish for pressure-treated lumber; more
Q. In an older house wired with BX cable, can the original two-prong outlets be upgraded to three-prong grounded outlets, provided they're properly bonded to the original metallic boxes?
EMT costs more up front, but it's less likely to get damaged and makes future upgrades a lot easier.
Q: Is it possible to properly bond an electrical subpanel without running four-wire SER cable to it from the service-entrance panel? Some electricians have told me that under certain circumstances the subpanel can have its own ground wire and rod, while o
Phantom loads cost electric-utility customers $3 billion annually.
Insulating knee walls; step flashings not the culprit; homeowner safety should come first
From the editor; permeance of foam in unvented attics; electrical red flag; immigration
Q. As a building inspector, I understand Article 250 of the most recent National Electrical Code (2005 NEC) to mean that any potential grounding electrodes available to each electrical service must be bonded together into that service's grounding electrod
Expanded AFCI requirements; trenching turns deadly in Southern California; nicad battery recall; more
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