AT&T System 25 - Manual (Page 45)

INSTALLATION
Secondary Protection
External secondary protection, located at the trunk access area of the
System 25 cross-connect field, is required for all trunks and off-premises
lines. Refer to Table 2-B for approved trunk protectors.
FROM AC
LOAD CENTER
(TWO SEPARATELY
FUSED 15 AMP
C I R C U I T S )
SINGLE
POINT
GROUND
H GROUND
I
LOAD
CENTER
II
(GREEN)
(#14 AWG)
TO CABINET NO. 1
GROUND BAR MOUNTED ‘ GROUND BLOCK (MAX.
ON 4“ BOX (SQUARE D LENGTH = 2 0 F T . )
PK9GTA OR APPROVED
EQUIVALENT)
4“ BOX (RACO 230
OR EQUIVALENT)
HUBBELL RECPTS.
( 5262 15 AMP
OR EQUIVALENT)
4“ COVER (RACO 807
OR EQUIVALENT)
APPROVED
BUILDING GROUND
(#6 AWG, COPPER)
Figure 2-9. AC Power Distribution—Multiple Cabinet System
2-21