Service Lateral or undergound feeder

[Karl Warner]

For an underground residential lateral.

Situation- service drop to Pole..original 100 amp service with
pole monted Breaker Panel.

Owner installed a breaker panel inside the house. He fed the new 100 amp panel from a 100 amp breaker on the pole. However he ran underground service conductor (no ground). I know you can tap the service condutors
per 230.3. I cannot find anything in the code that prevents this (Can a service be fed from a breaker in outdoor breaker panel which is system bonded going out as service lateral and still be called a service,)
This could be considered a feeder since the conductors originate from
an overcurrent device... in a service bonded panel at the pole.
problem the 3wire service underground already run

I believe he could sub feed throuigh lugs at the bottom of panel ( will be installing new outdoor panel with subfeed lugs if necessary)

 

[suemarkp]

This is still legal if the 2008 NEC has not been adopted yet. If it has, then you either need to tap the service conductors (make it a service per 230.40 exception 3) or run a separate grounding wire with the other set of conductors. Sub feed lugs won't work if the panel is a main breaker style (because the wire to the house is still a feeder). Not even sure if sub feed lugs are rated for Service duty or not.

 

[Wes Smith]

I believe that since the service point is at the pole mounted panel, you need a separate ground from that point on.

 

[iwire]

Situation- service drop to Pole..original 100 amp service with
pole mounted Breaker Panel.

With the breaker at the pole this is without a doubt a feeder.

I believe that since the service point is at the pole mounted panel, you need a separate ground from that point on.

Under the 2008 that is true, under previous codes you could use the grounded conductor as the grounding conductor.

250.32(B)(2) in the 2005.