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Install Sneak Fuse Panels����� �� ��

Sneak current protection is required between the incoming RJ21X or RJ2GX network interface and the system for both trunk and off-premises circuit packs. The model 507B sneak current fuse panel, or equivalent, is recommended for sneak current protection. See Model 507B sneak fuse panel.

Model 507B sneak fuse panel���


Figure notes

1 507B sneak current protector (price element code: comcode 107435091)
2 25-pair male connector (In) (comcode 846300994)
3 25-pair female connector (out) (comcode 846300994)
4 220029 fuses (inside panel). Use a small screwdriver to pry top cover off

Each column of sneak fuse panels requires approximately 8 inches (20 cm) of horizontal wall space. Connector cables connect the network interface to the sneak fuse panel. Also, use 157B connecting blocks equipped with SCP-110 protectors for sneak current protection.

NOTE: Sneak current protectors with a rating of 350 mA at 600 V must be Underwriters Laboratories, Inc. (UL) listed for United States installations and Canadian Safety Association (CSA) certified for Canadian installations. The panel contains two 25-pair connectors, fuse removal tool, and fifty 220029 Sneak Fuses (and 2 spares). Use the SCP-110 protectors with 110-type hardware and on the 507B sneak fuse panel. The SCP-110 protectors can be ordered separately and installed on the 157B connecting block. Fifty protectors are required per block.

  1. Install the 507B near the network interface or patch panels with locally obtained #12 x 3/4-inch screws (or equivalent).

Sneak fuse connector pinout is a pinout of the cable wiring and associated fuse numbers.��

Sneak fuse connector pinout
Connector Pin Numbers
Pair/Fuse Number
26/1
1
27/2
2
28/3
3
29/4
4
30/5
5
31/6
6
32/7
7
33/8
8
34/9
9
35/10
10
36/11
11
37/12
12
38/13
13
39/14
14
40/15
15
41/16
16
42/17
17
43/18
18
44/19
19
45/20
20
46/21
21
47/22
22
48/23
23
49/34
24
50/25
25


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