AT&T System 75 Wiring Diagram page 62

Note: Sneak current protectors with a rating of 350 ma at 600V
must be UL rated for domestic installation and CSA certified for
Canadian installation.
SNEAK FUSE PANEL ORDERING INFORMATION
157B Connecting Block
SCP-1 Protector*
575-4 Sneak Current Fuse Panel
*The SCP-1 protectors must be ordered separately and installed on the 157B
connecting block. Twenty-four protectors are required per block.
Description
Associated Hardware
Comcode
403 613 003
403 617 632
402 989 016
2-35