I wired a timer switch for my 220v hot water heater, it only had 1 ground 1 line 1 load terminal.
Does it cut off hot water heater by breaking only one leg of the the power.
Thanks- Doug C.
Hi Doug - Great Electrical Repair Question! The 220 volt heating element must have both legs of power to operate and complete the circuit. Controlling one leg of power will keep it from working, however it is not a good idea and here's why: If the water heater ever needed a heating element replaced and you shut off the time clock and not the circuit at the panel you could get a nasty shock at the very least. I strongly recommend a 220 volt time clock. There are time clocks specifically made for 220 volt water heaters and are not much more expensive than the 120 volt type.
Controlling the water heater with a time clock is a great idea and will save you money - I highly recommend it, just make sure to adjust the ON-OFF schedule according to idea usage times. Test the water temperature as the tank needs time to heat back up and keep a eye on your electric bill to see if you need to fine tune the schedule.
An insulated water heater blanket will help too!
Be Careful and Be Safe - Never Work on Energized Circuits!
Electrical Wiring Tips for Home Electrical Wiring Projects
Tripping Circuit Breaker, Outlet at a Wall Switch, Light Fixture without a Ground Wire, Help with Home Electrical Wiring Projects.
See more House Wiring Videos from Ask The Electrician:
Perfect for Homeowners, Students, Handyman, Handywomen, and Electricians Includes: Wiring GFCI Outlets Wiring Home Electric Circuits 120 Volt and 240 Volt Outlet Circuits Wiring Light Switches Wiring 3-Wire and 4-Wire Electric Range Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet How to Troubleshoot and Repair Electrical Wiring Wiring Methods for Upgrading Electrical Wiring NEC Codes for Home Electrical Wiring ....and much more.
Intermediate to Advanced - Electrical Repairs and Circuit Wiring is Best Performed by a Licensed Electrical Contractor.
Basic Electricians Pouch of Hand Tools, a Voltage Tester and a Multi Meter.
Depends on personal level experience, ability to work with tools, work with electrical wiring, and the available access to the project area. Precaution:
Identify the project circuit, turn it OFF and Tag it with a Note before working with the wiring.
Modifying existing electrical circuits or installing additional electrical wiring should be done according to local and national electrical codes with a permit and be inspected.
» How To Wire It RIGHT!« Wire it with Confidence! Fully Illustrated Instant Download Now You Can Wire it like a Pro!
I think your site offers the the clearest and best electrical information for homeowners I have ever seen on the net.You have given me confidence to do my own projects which I never had before. THANK YOU! Paul, from Foxboro, Massachusetts
I wish I found this site earlier, it is by far the best electrical related resource I have found on the web. George, from Scranton, Pennsylvania
I love this site for an office worker that does not know anything about electric wiring. Bill, from New York City, New York
This site is so much better than the 3 books I just bought, I wish I came here first. Collin, from Grand Rapids, Michigan
Thank you for answering my question.
I was able to get this done. This site is perfect. I am glad I found it. Please keep it going. Mike, from Chicago, Illinois