OESC 250.94 Bonding for Other Systems.

In Oregon, either an intersystem bonding terminal can be used or an exposed and supported length of #6 bare copper conductor is permitted for connecting intersystem bonding conductors.
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In Oregon, either an intersystem bonding terminal can be used or an exposed and supported length of #6 bare copper conductor is permitted for connecting intersystem bonding conductors.

The intent of the intersystem bonding terminal is to provide an external location where bonding can occur for systems other than the electrical system for the premises.

Most telephone, satellite and internet providers will bond their systems to a listed intersystem bonding terminal which is directly connected to the premises grounding electrode system or the metal service raceway or service enclosure.

Oregon has amended this code section. The state allows an intersystem bonding termination device, but it also allows an exposed and supported length of #6 bare copper conductor for connecting the intersystem bonding conductors.

OESC 250.94 (A) The Intersystem Bonding Termination Devices. An intersystem bonding termination (IBT) or an exposed and supported length of #6 bare copper conductor for connecting intersystem bonding conductors shall be provided external to enclosures at the service equipment or metering equipment enclosure and at the disconnecting means for any additional buildings or structures. If an IBT is used it shall comply with the following:…

Oregon amendments to the 2023 NEC® are located in “Table 1-E” of the Oregon Electrical Specialty Code (OESC) which can be seen using the following link or the OESC PDF file located near the bottom of the screen: 2023 OESC

  Click here to view the OESC  

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OESC 250.94 Bonding for Other Systems.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

Which of the following can be used as a bonding method for other systems such as cable TV, phone or satellite systems?

A: Only a listed intersystem bonding termination is permitted.
B: Metal gas piping.
C: An exposed flexible metal service raceway.
D: An exposed and supported length of #6 bare copper conductor, installed external to the service enclosure.
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