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I think I've posted this issue before, maybe here, but can't find it. We install EV charging, mainly, for a few years now, and this has come up a couple of times, different jurisdictions. Today's problem case:

Existing city house (overhead service, crosses above garage), existing detached garage (small "shop" attached to back), like usual fed by OLD 15-amp underground from house (we would kill this).
To run a new feeder from house, very high degree of difficulty, partly due to complicated finished basement, but mainly: underground, due to paving, cement/stone sidewalks, deck/patio, and very highly developed landscaping; overhead, due to no good path -- odd main building layout, numerous ornamental trees (some large).

The utility lines run on poles along the lot line about 10' behind the garage.
I've put in a request to the utility company for a new separate service, 150 amps, with a second meter, to the detached garage. From an installation point of view it is by far the simplest approach. I believe POCO requirements are that a second service is only allowed if it's designated "commercial"; the customer has no problem with that, or with the minimum monthly fees.

One problem with the POCO question is that they're apparently even more short-handed in the office than usual, with 1-hr waits on hold on the ESI line being common, and Engineering is now known as "where jobs go to die." Nonetheless, I anticipate that at some point the conversation will commence. Meanwhile, I'm looking at the NEC and the POCO handbook, and see nothing that specifically prohibits two separate services to separate buildings on one property. It seems viable to me, although I imagine they may require signage at each meter indicating locations of service disconnects on the property. No big deal.

Thoughts, comments, suggestions, appreciated. THX.

Read this and been thinking about it. If the garage is in back of the house, there is either a drive way from front or alley in rear. (Meaning access)

Have you looked into the cost of horizontal boring? Minimum disturbance,

Older part of town here has alley ways power lines run down them. When I am contracted to replacing a garage which happens quite often, bigger garage maybe even apt above). Meter base is moved to the garage and trench or horizontal drilling (if mature landscaping and patios, brick walks etc) to main house.

The PoCo here loves it, getting rid of overhead lines. So does the home owners.

just a thought?
 
that is a good suggestion ... but
he did mention he didnt want to trench because of multiple lines in the path from the existing service on the house

so probably still the same problems as trenching, unless you could determine the depth of the lines and go under them
then you have a really large, deep hole at both ends
that means lots of dirt to pile up some where

however if he gets a separate service, that could work easily, if it isnt too expensive compared to OH and they dont really care either way
 
Discussion starter · #44 ·
Have you looked into the cost of horizontal boring? Minimum disturbance,
Good thought, we've used directional drilling in the past. Not enough space in this case for the equipment. Overall point-to-point trench would only be maybe 40' anyway.

I think we may have found a route that only requires one cut across the driveway.
 
Discussion starter · #45 ·
My directional drilling sub-contractor has a way of tunneling under sidewalks and roadways called a "missile," an impact tool driven by an air compressor, that allows conduit to be driven in easily behind or after it. I did not know such things existed.
 
a construction crew i was on in the 1980s used them
they called them gophers
if you had to back it out because you missed the catch hole or some other reason
it could be put in reverse by pulling really hard on the air hose, but only after releasing all the pressure in the hose
 
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