Who's been doing side work?

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iwire

Moderator
Staff member
Location
Massachusetts
The following based on the 2002 NEC

The FMC outside

348.12(1) specifically allows FMC to be installed in wet locations with some provisions.

So IMO the installation may have met the code at the time.

The sizing

702.5 requires the generator to be sized to power all the load intended to be operated at one time.

It also goes on to say that 'the user shall be permitted to select the load connected to the system.

IMO this means the installation you describe met the code at the time.

The fact the NEC change the requirements for the 2008 proves this to be true as now it is clear when using an ATS the generator must be capable of supplying all the load on the ATS. (Not including any shunted loads as Larry suggested :smile:)
 

Cramersbj

Member
Location
Pewaukee
I think the following should be noted. This is a great discussion and should continue as sizing generators seems to pose problems across the country for contractors.

First, understand if your state or local AHJ has adopted the 2008 code.

Second, if the 2008 code has been adopted, 702.5 allows us to size using article 220 OR BY ANOTHER APPROVED METHOD. Using article 220 is just as it states, sizing the generator for the circuits being backed up. What is "another approved method"? If accepted by the local AHJ this could be using a power analyzer, billing history, load summation or even forced load method which can drastically reduce the size of the generator.

Third, we have only had a little over half the states adopt the 2008 so using it as the one and only is confusing to the contractors and inspectors in the areas it has not yet affected.

Fourth, I saw allot of conversation in this thread that talked about FMC. I believe the installing contractor installed a prewired UL listed assembly. That doesn?t me FMC is allowed to be installed outside but I am sure you will get more then 5 90's when he shoved the extra wiring up into the rafters.

Hope this helps.
 

iwire

Moderator
Staff member
Location
Massachusetts
Fourth, I saw allot of conversation in this thread that talked about FMC. I believe the installing contractor installed a prewired UL listed assembly. That doesn?t me FMC is allowed to be installed outside

If you take the time to look at 350-5(1) of the 1999 NEC or 348.12(1) of the 2002 NEC or 348.12(1) of the 2005 NEC you will find field installed FMC was allowed in wet locations.

This has been changed for the 2008.
 

electricalperson

Senior Member
Location
massachusetts
If you take the time to look at 350-5(1) of the 1999 NEC or 348.12(1) of the 2002 NEC or 348.12(1) of the 2005 NEC you will find field installed FMC was allowed in wet locations.

This has been changed for the 2008.

i believe the change was for the better. i hate seeing FMC outside. its always rusted like a bastard
 
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