Question about Reliance Natural Gas Water Heater Control
There is a lot of controversy over this. The reasons that you may want to do it are because of cathodic erosion. If the water has high mineral content it can shorten the life of the tank. If you are using plastic pipe in the house it can affect the situation also. All that aside, the reason for the grounding is found in the National Electrical Code and is in section 250.140 . The reason is that the code calls for grounding of all other metal piping systems that do not carry water. That would mean the natural gas line! The reasoning is because if something happens and energizes the gas line and it is not grounded it could cause a fire or an electrocution hazard. The code calls for a ground wire of sufficient size to handle a stray voltage of the amount that would be most likely found in the application. So you have 220 VAC in most residential applications. That would mean that you should use something in the neighborhood of about # 8 to # 12 AWG as a ground. There are charts to determine the exact size. IT depends on the length of the run.. The wire should be connected to the area closest to the control head if the head is not insulated from the pipe and then run to an electrical ground nearby. The installation has to be done by an electrician and not a plumber unless you do it yourself IF YOU ARE THE OWNER OF THE HOUSE AND IT IS NOT A RENTAL.
Posted on Oct 21, 2013
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Posted on Jan 02, 2017
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