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Sounds like you really do want to identify/map every cable segment, and possibly every conductor in every cable in the house. A tool used for this in the telecom sector is a tone generator and amplifi …

The business about sharing a neutral wire among those circuits is sketchy. It's possible that the pump runs on 240 volts and so doesn't actually use the neutral at all, though. As others have pointed …

If this is USA-style wiring and the plug is polarized then the wide blade is neutral. On a 9-volt battery the larger connector is the negative terminal. … Use a volt meter to look for the 9 volts in the wiring of the lamp. If you measure -9 volts then reverse the red and black meter leads. …

Fishing for wire - basic technique Tie a loop in the end of a reasonably light-weight but strong string (mason's line or similar). The loop should be maybe 3/4" diameter. Raise the loop into the inter …

In some parts of the photo one can see that the cable is thick at its edges and thinner in the middle, suggestive of having two insulated conductors at the edges and nothing (or a bare conductor) in t …

Retrofitting low voltage wire through a finished structure can be a challenging brain-teaser. When you mention fishing through an "intake vent" are you referring to the ducting of a central HVAC syste …

A "multi-wire branch circuit" can provide two 120 volt circuits using 4 conductors (it also simultaneously provides 240 volts, which may or may not be valuable to you). An off-the-shelf solution is to …

Should a cable that long be in conduit? Yes, that's a good idea, primarily because it'll be easier to repair or replace if/when something goes wrong. CAT6 cable is probably not the best solution to yo …

Some devices, like Leviton M52-RS115-2WM (found through Home Depot web site a moment ago), have a little brass springy piece connecting the device yoke to the mounting screw at one end. When this bras …

So, you could keep the wiring as-is in the furnace and make adjustments at the thermostat, or you could fix the wiring to conform to convention. … Minimal Change If you prefer keeping the furnace wiring as-is, connect the new common wire to the transformer C along with the red jumper. …

To convince yourself of the need to get help with the wiring, use a volt meter to check the line-to-neutral voltage on both legs of the supply coming in to the main panel during a time when this bright-and-dim …

ECM means "electronically commutated motor." Fundamentally it is likely a brushless DC (BLDC) motor. Commutation is the fancy name for the process of moving the magnetic fields in sync with the motion …

There exists a putty called "duct seal compound" which you can pack into the opening of a pass-through plate to seal the opening. I couldn't say whether it is rodent-resistant (few things are) but it …

You can certainly put some ends on the cable and find out what happens. Chances are it'll be CAT3 cable at best and the Ethernet may link at only 100 Mbps or 10 Mbps (if at all). But maybe that's good …

A: Breaker trip ratings aren't exact. They have to fit a certain profile, but there are tolerances in manufacturing that will cause one circuit breaker to trip earlier than another equally marked brea …