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Anyone know how to properly rewire a traffic signal? Answered

I recently obtained a traffic signal, and I'm interested in getting it to work via a standard US outlet. I want to also be able to turn on each light separately. There are 3 hot wires(1 for each light) and 1 neutral wire. I have very basic wiring skills, but I'm concerned about sharing(splitting) the neutral wire into three switches. Any thoughts or ideas on how to properly wire this? Thanks in advance. Just for your knowledge the lights are each rated at 116 w up to 130 volts.



Best Answer 9 years ago

Put one switch each on the black wires. Make sure these are rated for 130V and 1A at least. Wire black and grey to the standard US outlet (top left) L


If you are using a DC switch, you must make sure its rated atleast 223.21 dc volts- 1.717 times the RMS (root mean square) of 130 VAC. If your using an AC switch, then one rated for 130 VAC is fine.

I meant a standard household light switch, sort of "make sure the switches are designed to handle this sort of thing". I don't often see switches that identify themselves as AC or DC, do people sell them marked as such? (If you're using the words "at least" it is not necessary to quote values to 2dp...) L

. It is common for industrial switches, relays, &c; to have contact specs listed for AC and DC. Since household light switches are designed for AC at either 110 or 220 V, there is no reason to have DC specs for them.

I'd expect that for industrial, I was thinking of easy to obtain domestic varieties. (It's 240VAC where I live) L

Thanks for all the help!

Replace the guts with leds - not too expensive - and can reasonably be run from usb. The incandescents are wasteful, and harder to connect to an electronic circuit.

is a great simple circuit that can be used to switch the light in a realistic fashion. Replace the output leds with power transistors and you've got yourself a higher-power blinky light of glory.

Lemonie has a simple fashion of controlling which one is turned on as well.

. The lamps will pull ~1A (116W/130V) each, so max load on the common is ~3A. As long as the common is 24AWG or larger1, you will be OK. I'd go with 16 or 14 AWG, just to be on the safe side.