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!
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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.
This is a testing tool that is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
This is great to troubleshoot a problem with outlet circuit wiring, is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets
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Lights indicate if wiring is correct and indicator light chart is included
Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect, Very handy and easy to use.
A wire stripping tool used to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets.
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