Mobile homes.

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highkvoltage

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I have two mobile homes. They share a riser pole and SEU that feed a horizonal 2 gang meter base. Both have 100 Amp disconnects under the meters. One of the lots is getting a new trailer and the owner would like a 200 amp service. The trailer that is not being replaced is keeping his 100 amp service. I realize that the SEU and horizonal meter base will have to be changed for the new 200 amp service and that I will just reconnect the 100 amp service to the new meter base. The trailers are about 950 sq ft in size. Here are my questions:
1)Do I just add the services and size the conductors at 300 amps or can I size them to the largest load at 200 amp?
2) What size conductors would I have to feed the meter bases with?
3) Are the load calculations the same as in a normal house? (Not that a moble home are not normal or inferior just didn't know how to pose the question)
 
Re: Mobile homes.

Mobile Home Park, 550.2 Definitions:
A contiguous parcel of land that is used for the accommodation of occupied mobile homes.

Websters Defined:(contiguous)-touching all or most of one side. *the United States is contiguous with Canada.

High K, *IMO -in reading your post..It can be considered "Mobile Home Park", and subject to: Demand Factors for Services and Feeders of Table 550.31-( one-through sixty-one, plus.)

*no 300 ampere service needed, High K..
 
Re: Mobile homes.

highkvoltage,
You might want to check and see if the meters are only 100 amp. Where I'm at anymore they are installing 200 amp dual meters and just putting in 100 amp services. They do this just in case something like your talking about happens. But again areas do it different in many parts of this country.
Jim
 
Re: Mobile homes.

it seems to me that if the owner is requesting a 200A service there may well be a reason he wants it, and you might want to take that into consideration rather than just use the code numebrs.
 
Re: Mobile homes.

They're telling him he needs a 200 amp service at the trailer lot, the local hardware and etc.

The last time one of my employees went through all this, bought all the new heavy stuff, had it installed, and when it finally arrived, the trailer had a 100 amp main breaker installed in the panel inside, and even had a circuit for the AC condensing unit already installed. So go figure.

Jim
 
Re: Mobile homes.

Originally posted by petersonra:
it seems to me that if the owner is requesting a 200A service
Click to expand...
Edited:I have no reason of want,to spin-off into a endless, debate..

[ August 30, 2005, 01:51 PM: Message edited by: dillon3c ]
 
Re: Mobile homes.

Thank you for your replys. The owner is a retired electrician and just wants a 200 amp service. The home hasn't been delivered so to do a calc. of the load isn't possible. The meters are Class 200 so thtat is not a problem.
 
Re: Mobile homes.

dillion, I looked at that table. Heres what I came up with:

1st moblie home 100 amp plus second mobile home 200 amp times 55% equals 165 amps.

I fiqure a 200 amp horizonal gang meter base feed with 4/0 Alum. SEU with the proper disconnects under each meter. 5/8" X 8' groung rod with #4 copper going to each disconnect. The ground would be continuous from one disconnect to the ground rod to the other disconnect.
 
Re: Mobile homes.

Originally posted by highkvoltage:
dillion, I looked at that table. Heres what I came up with:

1st moblie home 100 amp plus second mobile home 200 amp times 55% equals 165 amps.

Click to expand...
Wrong answer. This is not 55% of 100+200, it is 55% of the calculated load or 16kva which ever is larger.
:)
 
Re: Mobile homes.

Originally posted by highk.
The trailers are about 950 sq ft in size.
Click to expand...
High K,
JW would be correct in his analysis.Tables not used in that fashion.But I ran two-(2)"mock calculations" yesterday morning useing 550.18, on these dimensions that you provided.

I also don't now,and have never lived in a mobile home as of this date.

*I had installed appliances in both of these homes,as of what I had seen in others,by memory.

Minus,a trash compactor & sink disposal.Also seeing water would probably be well pump,not city-tapp.

Gave you the dishwasher,H.W.heater,dryer and the A/C largest of load,and times-by two dwellings alike.

Useing table 550.31,in the demand factor of two MH's..First calculation came up with 220 amperes in- [P/E=I].
(I always run calculations @ least twice.)
Second mock calculation was lower, and the basis for my statement(*300A not needed).Granted all where mock and needed hard numbers to play with,before I'll throw it out.

But in my statement,I believe 550.31 could be "factor" in your installation..(MH Park.)

*Seeing you have (two)100 ampere services,that were exsisting on same common pole/riser.I would have assumed,that no one has taken advantage yet of table 550.31..Or you would have dropped a flag, in your posting.

But still, the number all mock brother HighK..

edited: for spelling & Mock appliances

[ August 31, 2005, 09:01 AM: Message edited by: dillon3c ]
 
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