Circuit protection installation

Last Updated : Jun 11, 2020 |

All out-of-building trunks, lines, and terminal installations require protection from sneak currents and over-voltages, such as lightning and power line induction. Campus installations (interbuilding cabling) of phones or other standard devices require over-voltage and sneak current protection in both buildings. You must install over-voltage and sneak current protectors in accordance with subsections “Protective Devices” and “Cable and Primary Protector Bonding and Grounding” of NFPA 70: NEC Article 800 , or local safety codes.

Field installed sneak current protectors must have a maximum current rating of 350mA and a minimum voltage rating of 600V.

The following over-voltage and sneak current protection devices are approved for use with G430 Branch Gateway:

Media modules

Approved over-voltage and sneak current protection devices

Avaya MM710 and MM710B media modules

Over-voltage and sneak current protection for these interfaces are provided on the media modules themselves.

Avaya MM711, MM714, MM714B, and MM716 analog media modules

Over-voltage and sneak current protection for these interfaces is provided on the media modules themselves. Normally, the local phone company provides primary over-voltage protection for incoming trunks.

Analog voice terminals require one of the following types of combined over-voltage and sneak current protection at both building entry points:

  • Gas tube with heat coil. 4B1E-W

  • Solid state with heat coil. 4C1S

  • IROB (In-Range Out-of-Building). 146C (4 - lines) or 146H (25 - lines)

Avaya MM712 and MM717 DCP media modules

Out-of-building connections require either the 146E IROB or 4C3S-75 solid state protectors for over-voltage and sneak current.

Avaya MM722 ISDN-BRI media modules

Over-voltage and sneak current protection are provided on the media modules themselves.

Avaya MM720 and MM721 ISDN-BRI media modules

All out-of-building installations on both trunk (network) and line (customer) sides require either the 146E IROB or 4C3S-75 solid state protectors for over-voltage and sneak current. Trunk side applications also require an NT-1 device.
Warning:

Only service-trained personnel can install these circuit protection devices.