Utility pole to meter conductor type

[KnoxvilleGains]

I was provided this Utility Drawing by my local utility. I'm having the pole transformer moved to another pole and running underground to a new disconnect/meter on the side of the home during a re-truss of the home which requires removal of the existing overhead.

The utility requires conduit due to the rocky soil (confirmed rocky during trenching, terrible). This is creating issues for me in specifying a proper conductor type for the run. It's 4/0-4/0-2/0 Al but the issue here is my loop from the weatherhead to the pole transformer. Everyone has suggested URD (specifically Southwire Sweetbriar 55418406) but the exposed loop concerns me. I can't find anything stating this is UV rated and the jacketing is cross linked polyethylene. That's the same material as PEX which is certainly not rated for UV exposure.

Anybody had a similar application? What did you ultimately go with? This is a 2" conduit run of about 160' with two vertical 90s, one horizontal 90 and two horizontal 45s.

 

[Little Bill]

I was provided this Utility Drawing by my local utility. I'm having the pole transformer moved to another pole and running underground to a new disconnect/meter on the side of the home during a re-truss of the home which requires removal of the existing overhead.

The utility requires conduit due to the rocky soil (confirmed rocky during trenching, terrible). This is creating issues for me in specifying a proper conductor type for the run. It's 4/0-4/0-2/0 Al but the issue here is my loop from the weatherhead to the pole transformer. Everyone has suggested URD (specifically Southwire Sweetbriar 55418406) but the exposed loop concerns me. I can't find anything stating this is UV rated and the jacketing is cross linked polyethylene. That's the same material as PEX which is certainly not rated for UV exposure.

Anybody had a similar application? What did you ultimately go with? This is a 2" conduit run of about 160' with two vertical 90s, one horizontal 90 and two horizontal 45s.

Your POCO requirements stink! All the POCOs I deal with here (4 or 5) furnish the wire from the transformer to the meter. Also, they put the conduit on the pole. We may have to furnish it, but they install it. One POCO requires us to put up the 1st stick, but they put it up the rest of the way.

With that said, the 4/0-4/0-2/0-4 Al mobile home feeder is sunlight resistant and also can be direct buried or in conduit. I've used it many, many times for overhead services. I don't know why your specs call for the #4 as you don't have an EGC until you leave the 1st disconnect with OCP. If it's not needed, I just untwist the conductors and remove the green EGC from the feeder.

 

[KnoxvilleGains]

Your POCO requirements stink! All the POCOs I deal with here (4 or 5) furnish the wire from the transformer to the meter. Also, they put the conduit on the pole. We may have to furnish it, but they install it. One POCO requires us to put up the 1st stick, but they put it up the rest of the way.

With that said, the 4/0-4/0-2/0-4 Al mobile home feeder is sunlight resistant and also can be direct buried or in conduit. I've used it many, many times for overhead services. I don't know why your specs call for the #4 as you don't have an EGC until you leave the 1st disconnect with OCP. If it's not needed, I just untwist the conductors and remove the green EGC from the feeder.

Thanks for the reply. The drawings is kind of poor, the #4 is just from the service disconnect to the grounding rods, not through the conduit run.

 

[Little Bill]

Thanks for the reply. The drawings is kind of poor, the #4 is just from the service disconnect to the grounding rods, not through the conduit run.

I see only three wires in the drawing, but they list #4 in the conductor sizes. You can't use Al to the ground rods, so I don't think they should even list it. The #4 copper is correct as far as their requirements. I see lots of POCO requiring #4 to the ground rods, but the NEC says #6 is all that is required for ground rods.

 

[KnoxvilleGains]

Right, they require #4 solid Cu. I don't argue with the POCO. Not worth my breath. Appreciate the conductor input,any thanks!

 

[electrofelon]

I use URD for almost all services . Around here it's marked use-2/RHH-2. I admit that sometimes I forget to check if it has the sunlight resistant rating, I think that is important.

 

[KnoxvilleGains]

I use URD for almost all services . Around here it's marked use-2/RHH-2. I admit that sometimes I forget to check if it has the sunlight resistant rating, I think that is important.

Yes. I think if it isn't rated for overhead, this application won't work given the exposed loops to the transformer.

 

[BarryO]

Your POCO requirements stink! All the POCOs I deal with here (4 or 5) furnish the wire from the transformer to the meter. Also, they put the conduit on the pole. We may have to furnish it, but they install it. One POCO requires us to put up the 1st stick, but they put it up the rest of the way.

Same here. They specify trench depth and where conduit is required (e.g., under driveways) and conduit diameter. They take it from there.