NEMA 3R Bus Secondary

NEMA 3R Secondary Bus Wireway




EPI Secondary Bus Wireway are designed to allow distribution of large amounts of low voltage power. Ampacity ranges from 400 to 4000 amperes at 600 volts and below, single or three phase service. These Buss Wireways are typically used for multi-meter service.


Made from 12-gauge corrosion resistant steel, primed with gray-oxide and enamel painted inside and out with ASA-70, Light-Dove Gray. A drip shield top and smooth seam-free sides, front and back prevent rain, snow or sleet from entering the enclosure. Single and double door construction. Doors are equipped with handles for li ing and padlocking provisions. Additional internal secondary body supports are installed to prevent wireway from warping when covers are removed. Buss is stair- stepped and is arranged for entry on top or bottom. Buss wireway can be coupled together for longer lengths. Splice bars can be provided. 

Buss Bars

CD 110 Silver Plated Copper is used and buss bars are sized according to one square inch of copper bus per 1000 amperes. Buss bars are insulated with 3” 600-volt standoff insulators. Bars are punched with 9/16” holes at 1 3⁄4” each way to accommodate lugs. All Buss Bar ends are punched with 9/16” holes to receive splice bars.


The standard finish is Sherwin Williams ANSI-70, light-dove gray enamel, inside and out.

Industry Standard

Meets National Electrical Manufacturers Association (NEMA) standard for Type 3R (Rainproof and Sleet-Ice Resistant) enclosures. 


Available in shorter and longer lengths as specified by our customer. Lengths longer than 144" can be broken up into smaller sections and connected using copper splice bars.

Custom sizes available.

Width Height Depth Gauge
31 16 72 12
31 16 96 12
31 16 120 12


NEMA 3R Secondary Bus Wireway