Product Brochure

47
Capacity: 400 amperes continuous at 600 volts a.c.
Application: For use with self-contained Type MT-K watt/hour meters on 3 phase, 4 wire wye and 4 wire delta services.
Enclosures: Constructed of 14 gauge galvanized steel suitable for indoor or outdoor installations. Ringless cover. Aluminum enclosure
available. Consult factory. All enclosures are NEMA type 3R.
Bypass: Separate manual type (H58888). Three required, 400 ampere bypass capacity.
Blocks: Glass fiber reinforced polyester plastic. High strength, arc and track resistant.
Terminals: 1/2” - 20 plated steel studs with nuts and captive Belleville washers to accommodate various pressure type lugs for conductors
from #6 to 800 KCM Cu or Al. Use 3/4” insulated wrench to fasten connectors to block (#55598).
Meter Mounting: The meter is mounted on six studs using 5/16” - 24 studs with nuts with captive Belleville washers. The three upper studs are
positioned so that the meter cannot be installed upside down. Use 1/2” insulated wrench (#55585). Another set of studs
provides out-of-service storage. With the meter in this position the slide plate in the box cover can be reversed so the cover can
be reinstalled with the words “out of service” showing.
UL: Type K-7 and K-7T are UL listed.
GENERAL INFORMATION:
KNOCKOUT DIAGRAM:
a
KNOCKOUTS (inches):
B: 1/2, 3/4
HH: 2-1/2, 3, 3-1/2, 4
HD: x4.281 HUB 0P
a See notes for specific KO changes
per catalog number.
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 H56271-2 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 447
CONNECTIONS:
Connectors for Single Conductor Per Terminal
Connectors for Two Conductors Per Terminal
H65476 (8 req.)
(250-800 MCM)
H58852 (3 req.)
(250-800 MCM)
H56732 (8 req.)
(Two #4-350 MCM)
H58853 (3 req.)
(Two #6-350 MCM)
H56732 (5 req.)
(Two #4-350 MCM)
H56476 (5 req.)
(250-800 MCM)
Group L
Single 800 mcm max
Overhead
Service
Group M
Single 500 mcm max
Underground
Service
Group J
Parallel 350 mcm max
Overhead
Service
Group K
Parallel 350 mcm max
Underground
Service
Polyphase Type K7 Polyphase Type K7 Polyphase Type K7 Polyphase Type K7
Ground Lug
Included
Ground Lug
Included
Ground Lug
Included
Ground Lug
Included