Auxiliary Gutter On Service

The following refer to sheet metal auxiliary gutters.

Auxiliary gutter on service.

The current carrying capacities of insulated copper and aluminum conductors are given in tables e 310 12 and e 310 14 respectively. E 374 06 carrying capacity of conductors. This article covers the use installation and construction requirements of metal auxiliary gutters and nonmetallic auxiliary gutters and associated fittings. My interpretation of an auxiliary gutter is a gutter made for and attached to the sides of an enclosure and they are always installed as a system with the cabinet.

How to calculate auxiliary gutter fill 366 22 a b categories. This auxiliary gutter used as a pull box is 5ft long 14inches deep by 14inches in height. The term gutter is used in this non raceway location in the nec. Articles 376 and 378.

The capacities of bars cannot exceed 1 55 a per square millimeter 1000 a per square inch for copper and 1 09 a per mm2 700 a per square inch for aluminum. Second an auxiliary gutter is not a raceway unlike the physically similar product known as wireway this is based on the informational note to the art. Articles 386 and 388 cover surface raceways not auxiliary gutters. Articles 376 and 378 focus on wireways not auxiliary gutters.

I get a lot of calls to make sure that the gutter that they are using is up to code. Article 366 auxiliary gutters i. The conductors from the service point to the service disconnecting means. Nowhere 30 ft is the maximum length for any auxiliary gutter.

There are two 4inch conduits feeding the bottom of the gutter with 4x600mcm conductors in parallel in each which pass straight through to the two 4inch nipples which connect to the bottom of the meter assembly feeding the 800 amp breaker. When there are not more than 30 current carrying conductors the derating factors for ampacities do not have to be applied. Articles 386 and 388. Electrical safety sizing a gutter for the proper fit is relatively easy.

Regi ster april 1964 no.