Step 2 Grasp the handle of the disconnect switch and pull the switch out of the housing. 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. Working on an energized circuit can result in severe injury or death from electrical shock. Know how to pull out a disconnect switch before an emergency happens. 2 are labled "line" and 2 are labled "load." The WH in the picture was in a house built in 2004. To install a gas water heater, start by placing it on top of cinder or concrete blocks using a lifting trolley or forklift. The manuf calls for 2 40Amp circuits with 8 gauge wire. Step 2: Remove the outside access covers . By code, do I need to install a local disconnect switch for a 240v Electric Hot Water Heater? 3. 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. Take the white wire ("hot" line) and wrap electrical tape over its insulation (this is for identification purposes). Controlling of Water Heater using Single-Pole Switch. I decided to install a disconnect switch by the unit, so I don't have to trudge to the outdoor electrical panel every time I … See 422 part III, and find the applicable subsection for your "water heater". Use a garden hose to drain the tank completely. Inside the disconnect switch box are 6 connection points. If you have conduit running to the wall then remove the plate and the conduit. (If you don't have electrical experience, hire an electrician to handle all the electrical wiring.) Last time, I mentioned I couldn't quite get to a water heater maintenance program without doing some repairs first.I figure step number one is to bring the electrical up to snuff. Use a 1/4 inch nut driver or flathead screwdriver to remove the upper and lower thermostat access panels. If so, would it have to be a small metal box with 2 40amp breaker switches? Ring main wiring gives the immersion heater the circuit capacity it requires. 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. 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. Locate your Power Box on your house and turn off the breaker labeled 'Hot Water Heater', ours was H/W Heater. See 422.31 A lock out on breaker would meet code. 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). This will make it easier to disconnect the water heater should you need to make repairs or replacements in the future. Follow the manufacturer's instructions for wiring the new water heater. The average service life of a water heater is between 8 to 12 years. If your water heater is wired in directly you'll need to turn it off at the breaker box. Use tape to secure the insulation out of the way. Disconnect the pipes and remove the water heater. Remove the plate on the hot water heater then remove the wire nuts. Step 1 Lift or open the door on your disconnect switch housing. I screwed / connected the green wires to the grounds. The wiring for my water heater runs from the circuit breaker to my disconnect switch to my electric water heater. '' can have the branch circuit device as the disconnecting means then typically attached to water! 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