HookedonPonics
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i have a 30 amp timer box and was planning on wiring it into an unused 30 amp 240 dryer outlet but the timer box has a 3 prong plug and the outlet is 4 prongs, is there anyway i can SAFELY connect them -Dee
i have a 30 amp timer box and was planning on wiring it into an unused 30 amp 240 dryer outlet but the timer box has a 3 prong plug and the outlet is 4 prongs, is there anyway i can SAFELY connect them -Dee
so if i just plug the timer box into a 240 volt 3 prong outlet and connect it with a 10/3 cable to a 4 prong plug that is connected to the dryer outlet and cap the neutral on the 3 prong end, will it work and will it run safely with no chance of an electrical fire?
I know this thread is 5 years old but I have already wasted a haft day of reading and still can't figer this out ..I have my timer box that has the 4 prong cord which I cut and want to hook up to my 3 prong male adapter .I get just capping off the natural but my timer box has 4x 120v outlets as well so I'm left wondering how to hook my box up with these extra 120 v outlets ..?Yes, just get a different cord, one that will fit the plug, and rewire your timer box, leaving the neutral (white wire) in the new cord unused and capped off. You can find the cords in the electrical section of the hardware or home improvement store. Keep your old cord in case you ever need to switch it back.
You'll be connecting two hots (probably black and red) and a ground (green), the white in the cord is un-needed (it's used in some appliances to create a 120v power source for clocks, and other things inside the appliance). It'll either be a range cord or a dryer cord.
Oh yeah, you can pull up to 80% load safely on any circuit. For example, on a 15A circuit, 12, on a 20A, 16, on a 30A, 24.
Sometimes I read some of the advice given on these forums, and I wonder if the original post was even really read or comprehended. But I digress...
Hope that helps! :rasta:
Thank you for the reply .Its simple, if you only need 240 power to run the ballast then you can wire the hot, hot and ground from the timer to your 3 prong male piece and plug into the dryer outlet. If you want to use the timer as manufactured ( 240 volt for the ballast and 120 volt for other equipment) you will have to run all 4 wires. This will not work with an old school 3 outlet dryer receptacle. If the later is the case, I would just go to Lowes and buy some new 10/3 Romex and run it from the grow room to your breaker box. You can run it through the attic, you can run it in the crawlspace under your house. Then tie it right into a 30 amp double pole breaker. Any body who is going to be a serious grower needs a multi meter and understanding of the homes electrical system. A cheap $20 book on electrical work would be a good buy. Its easy to grasp once you have a book with some pictures.