HOW TO – Build a Power Tap: updated…
On page 112 of MAKE Volume 05 (“How to Build a Power Tap”), we ran an illustration that could cause some confusion as well as a tripped circuit breaker. The illustration does not match the instructions (which are correct). The illustration shows a dual plug receptacle, which, when wired improperly, can cause a short circuit. If you attach the wires from the extension cord to the screws on the same side of the receptacle, it will create a short circuit. Don’t do that. Instead, follow the instructions and attach a wire to “each side of the electrical outlet.”