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RV Power Pedestal Conduit

 
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Old 01-30-2020, 10:14 PM   #1
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RV Power Pedestal Conduit


Hi guys,

Currently working on a small RV layout, with 2.5" conduit. 5 total spots.

I'm having a hard time determining the layout of conduit for the loop feed terminals.

75 foot spacing from first pedestal to last. Would I simply run 2 90's into each pedestal? Ie 1st 90 connecting to pedestal, 2nd 90' leaving pedestal heading back into conduit to next pedestal. .

Here are a couple pics of what I am referencing.

How do I get into and out of each of these pedestals with conduit?



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Old 01-31-2020, 12:34 AM   #2
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Re: RV Power Pedestal Conduit


That's how I did it on an RV park I built.

Or direct buried cable.

Other option is a pull box near every pedestal. That gets pricey quick, and a lot of extra work.

With only 5 pedestals, why 2.5" conduit? What size wire are you pulling?

Are they all 50A pedestals, or some 30's?

Big voltage drop issues?

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Old 01-31-2020, 01:05 AM   #3
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Re: RV Power Pedestal Conduit


Thanks for the reply!

I'd prefer to avoid direct buried cable, and run conduit for longevity sake. DBC would be cake in many ways. I just hate the idea of putting cable in the ground without it, especially since I am already there.

Plan to run 2.5" to handle 4/0 xhhw-2, basically quad plex.

I am gonna run 2.5" just to make the pull easier. All 50/30/20 with GFCI.

Would be interested in hearing other options, on wire and conduit size though.

With appx 15' spacing between pedestals I've been thinking the long sweep 90's may not ideal, especially considering I'll have 10 of them.
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Old 01-31-2020, 09:22 AM   #4
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Re: RV Power Pedestal Conduit


Can't help you with wire size, I know nothing about load calcs for a RV park.

2.5" will be good.
I use 3" if at all possible when I run 3/0 or 4/0 for single phase. I pay $0.95/ft for 2.5" sch40 vs $1.15 for 3" pvc. Fittings are where it adds up.


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Old 01-31-2020, 09:51 AM   #5
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Re: RV Power Pedestal Conduit


Interested as to why XHHW.

That's a hi-temp conductor.
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Old 01-31-2020, 12:47 PM   #6
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Re: RV Power Pedestal Conduit


Quote:
Originally Posted by Mike-B View Post
Can't help you with wire size, I know nothing about load calcs for a RV park.

2.5" will be good.
I use 3" if at all possible when I run 3/0 or 4/0 for single phase. I pay $0.95/ft for 2.5" sch40 vs $1.15 for 3" pvc. Fittings are where it adds up.


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No worries, I've already ran all the drops/calcs. Thanks for info on conduit though.
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Old 01-31-2020, 12:51 PM   #7
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Re: RV Power Pedestal Conduit


Quote:
Originally Posted by Seven-Delta-FortyOne View Post
Interested as to why XHHW.

That's a hi-temp conductor.
Seemed like a durable option, with good ampacity.

I have also considered mobile home feeder, and use-2 cable.

What would you use?
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Old 01-31-2020, 01:19 PM   #8
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Re: RV Power Pedestal Conduit


Quote:
Originally Posted by Seven-Delta-FortyOne View Post
Interested as to why XHHW.



That's a hi-temp conductor.
Is it aluminum?
In my parts, that's the only underground rated ALU the local supply house stock.

In copper, I can choose thhn or xhhw. I use xhhw on rooftops so I don't have to worry about derating due to ambient temps.

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Old 01-31-2020, 01:35 PM   #9
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Re: RV Power Pedestal Conduit


Brain fart.

Forgot we were talking about AL conductors.

Here as well, it's pretty much SER (cable assembly), USE or XHHW.
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Old 02-01-2020, 03:47 PM   #10
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Re: RV Power Pedestal Conduit


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Brain fart.

Forgot we were talking about AL conductors.

Here as well, it's pretty much SER (cable assembly), USE or XHHW.
No worries, but yeah xhhw alum.

I have been considering running MH feeder as well.

Seems convenient it is all nicely paralleled.

You think these 90*'s ought to work for feeding into and out of each respective pedestal?

https://www.homedepot.com/p/Carlon-2...-UPC/100136708

I think the saving grace for me is going to be #1 running oversized conduit, #2 the fact that I will only have 2 90's to get from meter to my row of pedestals, and #3 I will have about 15 feet between each set of 90's for each pedestal.

Project would be a lot cheaper and easier if I just could convince myself to run DBC haha.
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Old 02-01-2020, 04:53 PM   #11
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Re: RV Power Pedestal Conduit


Code allows 360 degrees of bend between pull points.

You shouldn't have an issue with 15' and 2 90's.

XHHW is kind of rough and sticky, so get a bucket of "Boy Butter" also known as wire pulling lube.

The yellow stuff is WAY better than the clear.

But yeah, Direct Burial would be a lot easier.
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Old 02-01-2020, 09:55 PM   #12
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Re: RV Power Pedestal Conduit


Quote:
Originally Posted by Seven-Delta-FortyOne View Post
Code allows 360 degrees of bend between pull points.



You shouldn't have an issue with 15' and 2 90's.



XHHW is kind of rough and sticky, so get a bucket of "Boy Butter" also known as wire pulling lube.



The yellow stuff is WAY better than the clear.



But yeah, Direct Burial would be a lot easier.
We've been using the spray foam lubricant. Won't use anything else now

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Old 02-02-2020, 12:20 AM   #13
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Re: RV Power Pedestal Conduit


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Originally Posted by TxElectrician View Post
We've been using the spray foam lubricant. Won't use anything else now

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Haven't tried that yet.

Guess I will now.

Thanks.
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Old 02-02-2020, 02:19 PM   #14
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Re: RV Power Pedestal Conduit


Thanks for the suggestions on the cable lube!

I am gonna try it.

Anyone have a favorite load center/CSED? Looking between Square D, Eaton, and GE.
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Old 02-04-2020, 11:55 AM   #15
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Re: RV Power Pedestal Conduit


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Haven't tried that yet.



Guess I will now.



Thanks.
I was hesitant to try it but was surprised how well it works and how long a can lasts.

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Old 02-04-2020, 11:58 AM   #16
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Re: RV Power Pedestal Conduit


Quote:
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Thanks for the suggestions on the cable lube!

I am gonna try it.

Anyone have a favorite load center/CSED? Looking between Square D, Eaton, and GE.
I use square d "qo" or eaton/ cutler hammer "ch". Homeline and BR are junk, as well as GE, at least IMO

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Old 02-04-2020, 08:18 PM   #17
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Re: RV Power Pedestal Conduit


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I use square d "qo" or eaton/ cutler hammer "ch". Homeline and BR are junk, as well as GE, at least IMO

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What makes you say those other panels are junk?

Just curious what makes someone form that opinion.

We used to do SQD mostly and Siemens on the budget projects. Our main supplier quit pushing Siemens and now pushes GE.



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Old 02-05-2020, 06:44 PM   #18
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Re: RV Power Pedestal Conduit


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What makes you say those other panels are junk?

Just curious what makes someone form that opinion.

We used to do SQD mostly and Siemens on the budget projects. Our main supplier quit pushing Siemens and now pushes GE.



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QO and CH both have copper buss, the others have aluminum.
CH has lifetime warranty on breakers.
IMO more wire bending space than the others. QO wins that!

Plus 40 years working on the stuff just have formed an opinion on what I like.

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Old 02-06-2020, 12:55 AM   #19
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Re: RV Power Pedestal Conduit


Any issue with running alu wire, with a copper bus?

I'd prefer a panel/load center with plug on neutral, instead of pigtails if possible.
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Old 02-06-2020, 03:49 AM   #20
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Re: RV Power Pedestal Conduit


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Any issue with running alu wire, with a copper bus?

I'd prefer a panel/load center with plug on neutral, instead of pigtails if possible.
Just use antioxidant

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