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Drawing attached showing setup. enter image description here

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    What's the reasoning behind having that intermediate disconnect? I take it the service disconnnecting means is on a pole or meter-board? – ThreePhaseEel Sep 20 '19 at 4:03
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    If you run a backhoe through that 112ft cable, and shorts it all together, will it melt the meter... Or will it trip a breaker in the left box? Does anything other than a breaker exist at that pedestal main? – Harper - Reinstate Monica Sep 20 '19 at 5:14
  • Are you in the US? – Retired Master Electrician Sep 20 '19 at 12:24
  • First box is a 200 amp mobile home service per permit. 2nd box is also a 200 amp main used as a junction box to connect the two runs of wire. 3rd box is the mobile home 200 amp main in the home. Yes, shorted line between first 2 boxes would trip the main. – james gibson Sep 20 '19 at 15:46
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At minimum you need a rod (or more usually 2, more than 8 feet part, since that gets you out of measuring the resistance cheaper than doing the measurement) at the entrance and the same at the mobile home. Given it's not a huge expense, buy 6 and sink a pair at the pedestal as well to be sure. No points off for doing more than the minimum.

I have 5 or 6 and a 100 foot well casing on a single service entrance, personally.

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  • From what I have read, the more ground rods used away from First disconnect increased the problems from lightening if I have understood right. The first first grounding rod is code here. I am confused. Appreciate the comments and help. – james gibson Sep 20 '19 at 15:52
  • If you are under NEC rules: diy.stackexchange.com/questions/132502/… – Ecnerwal Sep 20 '19 at 16:50
  • Hey thanks, that explains it all and I only have one ground rod to move from pedestal to mobile home(out building) Thanks to everyone that replied. – james gibson Sep 20 '19 at 19:43

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