Electrical safety sizing a gutter for the proper fit is relatively easy.
Auxiliary gutters nec.
Metallic wireway selection reference nfpa 70 national electrical code 2.
In concealed spaces as permitted in nec section 376 10.
The term gutter is used in this non raceway location in the nec.
I get a lot of calls to make sure that the gutter that they are using is up to code.
An integral junction box or wiring compartment as part of approved equipment shall be.
The openings must be closed.
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.
Unused cable or raceway openings in boxes raceways auxiliary gutters cabinets cutout boxes meter socket enclosures equipement cases or housings shall be effectively closed to afford protection substantially equivelant to the wall of the equipment if they are not going to use it.
Article 366 auxiliary gutters i.
Articles 376 and 378.
This auxiliary gutter used as a pull box is 5ft long 14inches deep by 14inches in height.
The covers shall be accessible after installation.
How to calculate auxiliary gutter fill 366 22 a b categories.
Where in the nec is it permitted to install an auxiliary gutter in a length longer than 30 ft.
This article covers the use installation and construction requirements of metal auxiliary gutters and nonmetallic auxiliary gutters and associated fittings.
In hazardous classified locations as permitted by nec articles 501 502 and 504.
Nowhere 30 ft is the maximum length for any auxiliary gutter.
2016 all star training inc.
Nec rules on installing auxiliary gutters longer than 30 ft.
Listen as paul abernathy talks about the requirements for not exceeding 20 fill for wireways and auxillary gutters.
As extension through walls if the length passing through a wal is unbroken and access to conductors can be mained from.
