Q: I would like to purchase a circuit tester for my tool kit, but I’m a little confused. I see three types at the hardware store – a small, cheap-looking tester; one that looks like a p… ...

HOME TIP: Always turn off power to a circuit at the main panel before testing, and double-check that the current is off using a circuit tester. Local journalism is essential.

If you're having circuit breaker issues, you'll want to use safe troubleshooting tools. Luckily, Klein Tools has several to choose from at different prices.

Q: I would like to purchase a circuit tester for my tool kit, but I'm a little confused. I see three types at the hardware store — a small, cheap-looking tester; one that looks like a pen; and a ...

An RCD (or GFCI in the States) is a kind of circuit breaker that trips when the amount of current in the hot and neutral mains power lines aren’t equal and opposite, which would suggest that the ...

The ICON Digital Circuit Tester is a new test light that is available at Harbor Freight. Unlike an old-school device, this light provides a bright red (positive) or green (negative) LED numeric ...

Most circuit tracers receive signals using a single axis sensor, which can make tracing hidden wires more challenging if they are not run in a vertical or horizontal direction — or if there are ...

This Design Idea is for an in-circuit tester which can be clipped onto each of the PROMs without removing them from the board. There is a test point on the PCB which disables the address drivers to ...