For example: If the existing cable is 12/2 Type-TN Copper with TW or THW insulation then a 2pole 25amp breaker would be correct. When properly installed, your home electrical wiring is protected by a circuit protection device. Using your cell phone, call your local electrician to inspect and service your breaker box. Dave’s Reply: (Manufacturer, model number?). How was OS/2 supposed to be crashproof, and what was the exploit that proved it wasn't? The water heats up trips the service panel (for house) breaker so I am continually resetting the (outside) breaker. If a disembodied mind/soul can think, what does the brain do? I figure about 3 more feet might be required to reach the shorter WH we are thinking about. The Line (L 1) as hot wire is connected to to the thermostat right terminal L 3. Note: In a 2 wire home like mine - meaning no 3rd ground wire in the outlet box or the outlets in the home. Remove the plate on the hot water heater then remove the wire nuts. 240V AC Non-Simultaneous Dual Element 5kW Water Heater Thermostat Wiring. Using a 30-amp tandem circuit breaker for a 120/240v circuit? You MUST use a two-pole breaker for a 240V circuit as previously mentioned. Wiring a Hot Water Heater in 7 Steps. Re: breaker is warm to the touch [Re: MThompson] #767474 08/26/13 09:50 PM 08/26/13 09:50 PM: Joined: Mar 2004 Posts: 10,197 New England. Has this ever happened to you? Electrical Panel Circuit Listing, This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes. Electrical Tools Required: Basic Electricians Pouch Hand Tools, Voltage Tester, and appropriate Safety Gear. Secure them with a wire connector and wrap electrical tape around the connection for additional safety. 1500 watts draws 12.5 amps, SO, can i place a 30 amp breaker switch within the same box with all the rest of the 20 amp breakers??? This could be the case at a water well or a workshop. In Summary Locate your Power Box on your house and turn off the breaker labeled 'Hot Water Heater', ours was H/W Heater. However, knowing how to wire a main breaker box can help a homeowner determine issues that may be stemming from the electrical wiring. In your comments you seem to be describing two separate panels each serving 120V only. Thanks, John.