2 services to existing bldg. Need new calcs

[sfav8r]

We ran across a strange installation last week. Basically there were 2 under ground power feeds to the same bldg. It is easy to see how this happened because even though it is one bldg. it's on the corner and 1/2 the addresses are on one street and 1/2 are on the other. At any rate, since we're upgrading the service, poco wants us to eliminate one service and utilize the other. There are a total of 8 units, normally this would be pretty straight forard, but one of the units is a mom and pop grocery store. I believe what I need to do is the following:

1) The 7 units of resi get calculated just like any other resi bldg.

2) The store falls under commercial and all of the fixed loads like freezers, refer boxes etc are calculated by nameplate rating.

Is this correct?

Thnaks.

 

[haskindm]

Re: 2 services to existing bldg. Need new calcs

The store will need to be calculated using Part III of Article 220. The dwelling may also be calculated using this section or you may use Part IV of Article 220. There are no shortcuts, you will need to work through the entire calculation adding 25% for continuous loads (such as store lighting), adding the 200 VA per foot of "show window lighting" (whether or not it is installed), etc.

 

[bob]

Re: 2 services to existing bldg. Need new calcs

You can also see if there is a demand meter installed for the grocery. If so get the max demand from the utility and add 25% per 220.87.

[ February 13, 2006, 05:18 PM: Message edited by: bob ]