The switch must be rated for the Voltage of the water heater ( 120 , 240 etc) and the amperage drawn by the water heater -2008 NEC 404.14. To replace a failing gas water heater or install a new one, you need a gas supply line, a cold-water supply line and a flue connection to divert harmful combustion gases. Water Heater Electrical Junction Box Hi Tom, Most conventional electric water heaters have a built in junction box located in the top of the unit. Measure out the length needed to span the space between the electrical box and the water heater. 2 are clearly labled grounds. I always hard wire them when the main panel is within sight as it was in this picture. It had been a common practice to not install a separate disconnect when a water heater is located in a basement and within sight of the circuit breaker panel. Fold back the insulation over the thermostat. This energy is measured in British Thermal Units (BTUs) per hour. If you have conduit running to the wall then remove the plate and the conduit. Currently, I just have a junction box where the 240v wires are wire nutted together and providing power to the water heater. If so, what kind of disconnect can one use--I haven't found any 30amp toggle switches, only the big boxes with the pull-out connector plugs (like the ones used for AC's and Heat pumps)? I screwed / connected the black wires to the "load" connection points. Locate the breaker inside the panel box labeled “water heater” or “hot water” and turn the breaker off. If the wiring is fine, then the controller probably needs to be replaced. Generally, electric heaters have a lower recovery rate than gas-powered heaters, and the smaller the tank is in a water heater, the quicker the heater will heat the water. 2. Use tape to secure the insulation out of the way. See 422 part III, and find the applicable subsection for your "water heater". The flexible tubes then fit between them with coupling nuts that screw onto the adapters. Take the black wire from the circuit and any wire from the water heater and connect them (twist together and secure with a wire nut). I'm roughing in for an 80 amp tankless electric water heater that will go under a bathroom sink. I will install a disconnect if not within sight of the circuit breaker panel. The wiring for my water heater runs from the circuit breaker to my disconnect switch to my electric water heater. Many water heaters have an estimated life expectancy of 8 to 12 years. Water heaters are appliances that supply hot water to your home, but they don’t last forever. Connect the water heater to the circuit - back within the junction box, you will wrap the ground wire around the ground screw and secure it. Is this a current code requirement? Every heater is different. WARNING! I read that if a there is not a direct line of site from an electric Hot Water Heater to the service panel, then there must be a disconnect located near the heater. Wiring Connections a the Water Heater The water heater will come with an electrical junction box which is typically located on the top of the unit. Portable Propane Tankless Water Heater, 1.32GPM/5L Capacity, 6 in 1 Safety Function, 7 more Usage Scenarios, Easy to Install, Low Pressure Startup, White 4.2 out of 5 … Remove 1 wire (it doesn’t matter which one) by finding its loose end and unraveling it from around the metal element. Apr 22, 2020: Electrical Forum discussion & Blog: Changing hot water heater, 3800 to 4500: Jan 1, 2019: Electrical Forum discussion & Blog: Question about breaker for water heater: Apr 19, 2018 Step 2 Grasp the handle of the disconnect switch and pull the switch out of the housing. Am I required to have an electric disconnect for it? The WH in the picture was in a house built in 2004. The data plate on your current tank has size and energy specifications that help make buying a comparable unit easier. In our case, we simply unscrewed the connection. A water heater tank might have a 30k BTU/H input, whereas a tankless may need 90k to 130k BTU/H. Since a water heater has no outlet, the cable will be run from the wall to the junction box on the water heater. This will make it easier to disconnect the water heater should you need to make repairs or replacements in the future. The average service life of water heaters is 8 to 12 years, so if yours is entering old age, you may want to consider purchasing a new unit (read our pick of the best tankless gas water heaters) versus repairing your old water heater.. Keep in mind that in most situations it's generally best not to switch fuel types (gas or electric), although sometimes it does make sense. To control a non-continuous (non-simultaneous) water heater using single way or one-way switch, we must use a 10 gauge wire size with a minimum 30 amp circuit breaker.In our case, we have connected the water heater directly to a 30 amperes single way switch which is protected by 30 amp circuit breaker from the main distribution board. Step 1 Lift or open the door on your disconnect switch housing. If it is over 300 VA and not within sight, the branch circuit device must have lockable means installed that complies with 110.25. I have used non fused pull out disconnects when the breaker box is not within sight. Your access panel may look different and may use a different type of screw. A water heater always requires a separate 220-volt circuit and in our case a 30-amp circuit breaker and 10/2 (with ground) circuit cable. If so, would it have to be a small metal box with 2 40amp breaker switches? 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