200 amp sub panel

[packersbay]

So I am trying to fix a situation that some other contractor did, I have a indoor 200 amp sub panel that someone installed off of a what looks like a 100amp main service. I am going to install a new main 200amp service with panel being a feed thru 8 space outdoor. I want to feed the indoor panel from the feed thru lugs. the distance is about max 15ft. I want to go thru attic with feeders to sub panel, so my question is what type of wire will be better for this and if it has to be in conduit.

 

[infinity]

I would use SE cable, specifically #4/0 SER.

 

[acin]

How are you getting feeder from exterior to indoor sub. Is the ext panel surface mount ?

 

[packersbay]

Yes exterior will be surface mount, I’ll LB into attic with conduit

 

[acin]

In another post someone said that conduit is a wet location 300. 9

 

[LarryFine]

In another post someone said that conduit is a wet location 300. 9

The conductors inside a conduit in a wet location are also in the same wet location.

 

[acin]

I was looking at 338.2 ,se cable has moisture resistant covering . Is that allowed in a wet location?

 

[augie47]

I was looking at 338.2 ,se cable has moisture resistant covering . Is that allowed in a wet location?

Yes

 

[goldstar]

Please forgive my ignorance here but I have some questions :

1. Is the sub-panel a MBP or a MLO panel (not that it matters either way)?
2. If you are feeding off a set of feed-thru lugs wouldn’t the sub-panel be considered service equipment?
3. Would you have to separate the EGC’s from the neutrals?
4. If you are going to use 4\0, 4\0, 4\0, 2 SER cable will you have lugs to land it on in the New 200A MB panel?

You do not need to sleeve the SER cable in conduit unless you have a local ordinance that requires it.

1. How do you plan to bend the cable thru the LB?

 

[kwired]

So I am trying to fix a situation that some other contractor did, I have a indoor 200 amp sub panel that someone installed off of a what looks like a 100amp main service. I am going to install a new main 200amp service with panel being a feed thru 8 space outdoor. I want to feed the indoor panel from the feed thru lugs. the distance is about max 15ft. I want to go thru attic with feeders to sub panel, so my question is what type of wire will be better for this and if it has to be in conduit.

That in itself is not a problem unless the load exceeds the 100 amp feeder breaker.

If the load is not there or is not anticipated to be there with any proposed additions I wouldn't call this something that needs attention, presuming it otherwise meets code requirements.

If the existing 100 amp service is in need of replacement I would probably replace with 200 amp though. Could possibly even then still put the feeder on a 100 amp breaker in said 8 space outdoor panel if the load isn't there.

Just some thoughts, you do what you feel is best.

 

[packersbay]

Please forgive my ignorance here but I have some questions :

1. Is the sub-panel a MBP or a MLO panel (not that it matters either way)?
2. If you are feeding off a set of feed-thru lugs wouldn’t the sub-panel be considered service equipment?
3. Would you have to separate the EGC’s from the neutrals?
4. If you are going to use 4\0, 4\0, 4\0, 2 SER cable will you have lugs to land it on in the New 200A MB panel?

You do not need to sleeve the SER cable in conduit unless you have a local ordinance that requires it.

1. How do you plan to bend the cable thru the LB?

The sub-panel is a 200amp main breaker, Yes we would separate EGC’s in sub-panel. In order for us to get SER cable from exterior to interior we would have to use conduit to penetrate to attic then run cable to sub in attic

 

[qcroanoke]

1. How do you plan to bend the cable thru the LB?

I would use a mogul LB or a piece of 3R wireway

 

[packersbay]

That’s right, I’ll probably not use a LB and just go straight up under eave of house and it will eliminate trying to bend wire

 

[acin]

Are the utility conductors over head or ug? The feed through lugs on our meter main combo are on the bottom with oh drop

 

[James L]

1. How do you plan to bend the cable thru the LB?

this question makes me curious.
It seems you're asking as though it's difficult

 

[AC\DC]

Hell ya that is hard. I use a 3" LB on 2" pipe if I have to do that for the extra room. You must work out!

 

[James L]

Hell ya that is hard. I use a 3" LB on 2" pipe if I have to do that for the extra room. You must work out!

If you're only sleeving up in?
Or if you're sleeving down and in?

You curve the SER through the LB first, then straighten it and sleeve the pipe onto it. Pretty easy

 

[infinity]

The issue is the bend radius in the LB.

 

[ggunn]

1. If you are feeding off a set of feed-thru lugs wouldn’t the sub-panel be considered service equipment?

Not if the main panel has a main breaker.

 

[steven765]

The curved back LB should alleviate the bend requirements https://www.eaton.com/us/en-us/skuPage.LBD6600.html