Posted by mnjoe on February 20, 2010 at 07:30:39 from (76.77.199.218):
In Reply to: Electrical Grounding posted by John T on February 19, 2010 at 10:31:46:
In MN...My brother-in-law had a wire break underground to his house in a farm yard. Years ago you could run wires from your meter pole that had a 200 amp meter setup with side arm handle for REA ON..OFF..Generator ON. This box had taps on the bottom for running wires to your buildings. You could connect anysize wire you needed for your service in each building. 200 amp down to 30 amp. For 240 volt run 2 hot wires and 1 neutral wire and drive a ground rod with a copper #6. THere are lots of Right ways to ground your service..it depends if new or old construction..if metal water lines, etc. You would land the earth wire(ground) and neutral on the same spot at the pole and each main service. This was allowed for years.....BUT....NOT NOW..Last winter when that wire went bad you could repair that wire between between the yardpole and the house..But if you replaced with new you had to bury 2 hots, 1 neutral and 1 ground with a disconnect on the pole for the house. Your neutral and ground would be on the same bar on the yardpole (Meter Main Disconnect). This could be a setup next to your transformer on the ground. In the house you need to separate the grounds and neutrals. Also will have problems with electric dryer and range. Years ago you could run 3 wires now they need to be 4 wire. Now any new farm yards or yards with more that 1 outbuildings need to have a way of shutting off each set of wires going to other building. Now it costs lots of money to do it right....This is what the NEC (National Electric Code) tells us now. Every 3 years we get a new bible. They have a group which gets ideas and from people. They then decide on how to use them. Remember the NEC is the minimum way to wire and there are exceptions to some things. Also ask your local electrical inspector. House wireing now you need GFCI and Arc-fault and tamper-proof recs.Just because your shop was wired a way 15 years does not mean that way is correct today. mnjoe
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