Nortel Meridian 1 option 11C Planning And Installation Manual page 41

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• All conductors must be terminated in a permanent manner. Ensure all
terminations are easily visible and accessible for maintenance purposes.
• Tag ground connections clearly with a message such as "CRITICAL
CONNECTION: DO NOT REMOVE OR DISCONNECT".
Once the Option 11C is installed, the impedance of the link between
the ground post of the main cabinet and the single point ground to
which it is connected must be less than 0.25 Ohms.
Reliable Option 11C operation depends on high-precision internal
circuitry, which can be damaged by transients in its supply conductors
and ground system. Damage to sensitive devices due to transients may
not be immediately apparent: degradation may occur over longer
periods of time.
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It is permitted in the USA under the exception to article 384-20 in the NEC
to isolate a panel's ground bus from the housing, provided the panel
concerned is not at the main service entrance. This is also permitted in some
Canadian locations. For more information on ground bus isolation, refer to
local electrical codes.
Do not isolate the ground bus from the housing unless it is specifically
permitted by local electrical codes. Work inside electrical panels
should only be performed by qualified electricians. Do not attempt to
remove bonding conductors without approval from qualified
personnel.
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