Ilsco Aluminum Grounding Connectors Catalog Page

Aluminum Grounding Connectors

Dual Rated

C

TYPE

GRM

Features

Manufactured from high strength 6061-T6 aluminum

•

alloy
Electro-tin plated

•

Type GRM - Elongated steel stud

•

GRF

Type GRF - Threaded female design

•

Fig. 1 Fig. 2

Catalog Figure Wire Range Single Cable Dimensions Hex
Number Number Max. Min. Steel Strand Dia. Thread A B L Size

GRM-2A 1 2str 12sol/str 5/16 1/4"-20 - 11/16 1-1/4 Slot

GRM-2B 1 2str 12sol/str 5/16 5/16"-18 - 3/8 1-1/4 Slot

GRM-2C 1 2str 12sol/str 5/16 3/8"-16 - 9/16 1-1/4 Slot

Benefits

Suitable for use with either copper or aluminum

•

conductors
Provides low contact resistance

•

Provides ease of grounding a single conductor to steel

•

structures or to tap a single conductor from bus bar
Provides ease of installation for a variety of standard

•

stud sizes

GRM-0 1 1/0str 2str 3/8 1/2"-13 - 1 1-9/16 Slot

GRM-250A 1 250kcmil 1/0 9/16 1/2"-13 - 1 2-1/8 5/16

GRM-250B 1 250kcmil 1/0 9/16 5/8"-11 - 1 2-1/8 5/16

GRM-350 1 350kcmil 4/0 - 5/8"-11 - 1 2-1/2 3/8

GRM-500 1 500kcmil 350kcmil - 3/4"-10 - 1-3/8 2-15/16 3/8

GRM-750 1 750kcmil 500kcmil - 3/4"-10 - 1-3/8 3-3/8 1/2

GRF-2A 2 2str 12sol/str 5/16 1/4"-20 5/16 - 1-1/4 Slot

GRF-2B 2 2str 12sol/str 5/16 5/16"-18 3/8 - 1-1/4 Slot

GRF-2C 2 2str 12sol/str 5/16 3/8"-16 7/16 - 1-1/4 Slot

GRF-0 2 1/0str 2str 3/8 1/2"-13 1/2 - 1-9/16 Slot

GRF-250A 2 250kcmil 1/0 9/16 1/2"-13 1/2 - 2-1/8 5/16

GRF-250B 2 250kcmil 1/0 9/16 5/8"-11 3/4 - 2-1/8 5/16

GRF-350 2 350kcmil 4/0 - 5/8"-11 3/4 - 2-1/2 3/8

GRF-500 2 500kcmil 350kcmil - 3/4"-10 7/8 - 2-15/16 3/8

GRF-750 2 750kcmil 500kcmil - 3/4"-10 7/8 - 3-3/8 1/2

All wire sizes, unless noted otherwise, are American Wire Gauge (AWG)
DE-OX Inhibitor is recommended for all aluminum terminations.

205

4730 Madison Road, Cincinnati OH 45227-1426 | PH: 513.533.6200 | FAX: [phone] | www.ilsco.com

In Canada: 1050 Lakeshore Road East, Mississauga, Ontario, Canada L5E 1E4 | PH: 905.274.2341 | FAX: [phone]