Mobile home feeder

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crtemp

crtemp

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Wa state
I am going to be wiring a mobile home soon and have a few questions about how I want to go about doing it. The service that I'm going to power it from is a 200 amp service that is located in a garage. The mobile will sit right outside the garage. What I want to do is go right out the back of the 200 amp panel and mount a disconnect on the exterior wall of the garage. From there it will be underground conduit to feed the mobile homes panel.

Is is it okay to attach the disconnect for the mobile home to the garage? I know I'm suppose to group disconnects but I'm pretty sure this panel will be a sub panel more than a service disconnect since there will be a 100 amp breaker in the garage panel that will kill it.

Also I'm assuming that I will need to pound ground rods for the mobile too? Do I just hook these into the exterior disconnect or do I have to land them in the interior mobile home panel?
 
Sounds like you have it under control. 4 wire to exterior disconnect with neutral isolated from EG. 4 wire to mobil home. I do not ever remember having to drive ground rods at the mobile home but if you are required to do so, they would connect to the EG bar in the home. I believe there was an extented discussion on the matter a few months back with typical varying opinions.
 
mjf said:
I try not to mess with mobile homes, but did one for a friend a few years ago. I did it as stated above with rods at the disconnect. I also bonded the MH frame at 2 corners.
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I have hooked up lots of mobiles in mobile parks and have always done ground rods at the service disconnect as well. Maybe I won't be required to have any since the disconnect will be mounted to the garage (which has a ufer ground).

Why don't mobile homes need a grounding system other than the 4 wire feeder? Any other detached building would need a ufer or ground rods. Is it because it's not a permanent foundation?
 
Why spend more money on another disconnect on the outside of the garage to feed the mobile home when you've already supplied it with a disconnect breaker in the garage panel?
Just run your 4 wire feeder to the mobile home and supply a ground rod attached to equipment ground bar at mobile home.
 
mopowr steve said:
Why spend more money on another disconnect on the outside of the garage to feed the mobile home when you've already supplied it with a disconnect breaker in the garage panel?
Just run your 4 wire feeder to the mobile home and supply a ground rod attached to equipment ground bar at mobile home.
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A disconnect would serve no purpose if it was within 30' but not visible. IMO.
 
crtemp said:
I have hooked up lots of mobiles in mobile parks and have always done ground rods at the service disconnect as well. Maybe I won't be required to have any since the disconnect will be mounted to the garage (which has a ufer ground).

Why don't mobile homes need a grounding system other than the 4 wire feeder? Any other detached building would need a ufer or ground rods. Is it because it's not a permanent foundation?
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Here they are required to be anchored. That is a long rod/spike driven under the home and bonded/strapped to the frame of the home. Since you are required to bond the EGC to the frame I think they are considering the anchor to be part of the GEC system.
This is just my thinking anyway.
 
crtemp said:
Ya. Disconnect must be within site of the mobile. I'll just get a knife switch probably
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Sorry I had to read Art 550.32
Seems to me there should be an exception for your circumstance. I did not realize that the mobile home had to have a disconnect within sight 30' or less from exterior wall even if there was a service already on the premises would think the MH could just be treated as a separate structure or maybe could be if the axils and tongue are removed. Heck it has a main breaker on the panel inside the home.
I guess maybe a breaker disconnect might be cheaper than knife switch though you'll have to check on prices.
 
mopowr steve said:
Sorry I had to read Art 550.32
Seems to me there should be an exception for your circumstance. I did not realize that the mobile home had to have a disconnect within sight 30' or less from exterior wall even if there was a service already on the premises would think the MH could just be treated as a separate structure or maybe could be if the axils and tongue are removed. Heck it has a main breaker on the panel inside the home.
I guess maybe a breaker disconnect might be cheaper than knife switch though you'll have to check on prices.
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Yep it was cheaper to get a 4/8 panel and another 100 amp breaker by $50
 
crtemp said:
I am going to be wiring a mobile home soon and have a few questions about how I want to go about doing it. The service that I'm going to power it from is a 200 amp service that is located in a garage. The mobile will sit right outside the garage. What I want to do is go right out the back of the 200 amp panel and mount a disconnect on the exterior wall of the garage.
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First place you or the owner needs to go is to the permit office and see if you will have any trouble putting a mobile home on the property to start with. Some areas no problem and in others it's a big problem.

From what I have seen every area has their own set of rules when dealing with mobile homes and it's just easier to find out what they are before you start.
 
In our county in CA you can get a permit to add a manufactured home for a relative (hardship) for only $1000 instead of the $50,000 the permit would otherwise cost for a second home with a foundation.

Tapatalk!
 
crtemp said:
I have hooked up lots of mobiles in mobile parks and have always done ground rods at the service disconnect as well. Maybe I won't be required to have any since the disconnect will be mounted to the garage (which has a ufer ground).

Why don't mobile homes need a grounding system other than the 4 wire feeder? Any other detached building would need a ufer or ground rods. Is it because it's not a permanent foundation?
Click to expand...

250.32 does apply to the disconnect located with in 30 ft. from the home.
 
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