Auxiliary Gutter On Service
Regi ster april 1964 no.
Auxiliary gutter on service. Articles 386 and 388 cover surface raceways not auxiliary gutters. How to calculate auxiliary gutter fill 366 22 a b categories. This article covers the use installation and construction requirements of metal auxiliary gutters and nonmetallic auxiliary gutters and associated fittings. The following refer to sheet metal auxiliary gutters.
The term gutter is used in this non raceway location in the nec. 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. 100 definition of raceway. When there are not more than 30 current carrying conductors the derating factors for ampacities do not have to be applied.
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. Electrical safety sizing a gutter for the proper fit is relatively easy. The conductors from the service point to the service disconnecting means. The current carrying capacities of insulated copper and aluminum conductors are given in tables e 310 12 and e 310 14 respectively.
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. Nowhere 30 ft is the maximum length for any auxiliary gutter. Articles 386 and 388. Auxiliary gutter shall not exceed 20 of the interior cross sectional area of the 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. E 374 06 carrying capacity of conductors. Articles 376 and 378. Article 366 auxiliary gutters i.
A wireway by definition is installed as a separate system from the panel cabinet or other enclosure.