Product Brochure

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Capacity: 400 amperes continuous - 300 volts a.c.
Application: For use with 3 wire single phase self-contained Type MS-K watt/hour meters.
Enclosures: Constructed of 14 gauge galvannealed steel suitable for indoor or outdoor installations. All enclosures are NEMA type 3R.
Bypass: Separate manual type #H56495.
Terminals: 1/2” - 20 steel studs with nuts and captive Belleville washers to accommodate various pressure-type lugs for conductors from
#6 to 800 KCMIL.
Blocks: Glass fiber reinforced polyester plastic. High strength arc and track resistant.
Meter Two position stud type. One set of studs provides out-of-service storage. The in-service studs are positioned so the meter
Mounting: Cannot be installed upside-down.
UL: Devices on this schedule are not UL listed due to wire bend requirements.
GENERAL INFORMATION:
KNOCKOUT DIAGRAM: a
CONNECTIONS:
KNOCKOUTS (inches):
B: 1/2, 3/4
GG: 2-1/2, 3, 3-1/2
HH: 2-1/2, 3, 3-1/2, 4
HD: x4.281 HUB 0P
a See notes for exceptions.
TORQUE DATA:
Connection Part No. Stud Size Wrench Size Torque
Lug Mounting H56271 1/2” - 20 3/4” Hex 500 in-lbs.
Nut/Washer
Meter Mounting 56271-2 5/16” - 24 1/2” Hex 150 in-lbs.
Nut/Washer
Lug Wire - - 5/16” Allen 275 in-lbs.
Binding Screws 3/8” Allen 375 in-lbs.
1/2” Allen 500 in-lbs.
K-Base Torque Specifications
NUT WITH
BELLEVILLE
WASHER
FLAT
WASHER
Install Flat Washer On Top
Of Connector Lug
Product Schedule 440
K4U
Connectors for single conductor per terminal
Connectors for two conductors per terminal
Lug H56733 (2 req.)
(250-800 MCM)
Lug H56476 (2 req.)
(250-800 MCM)
Lug H56477 (2 req.)
(250-800 MCM)
Ground Lug
Included
Overhead
Service
Underground
Service