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Q. If I have a limited heating and refrigeration license, can I perform the bonding of gas lines and simply swap out air conditioning units? 918-282-0040
A. Yes, an LHR is allowed to bond gas lines when replacing or repairing existing units because gas bonding is part of that installation. However an LHR may not run a bond back to the panel. Allowable
bonding is restricted to the short piece of wire from the gas line to the unit. (Tri-County Electrical Code Forum, February 7, 2002)
Q. When extending gas pipe to non-electrical gas equipment (barbecue, insert), are you required to bond the existing gas pipe connected to an existing gas or electrical appliance? 250.104
A. No, unless the alteration creates the potential to be energized.
(August 8,2002 Tri-County Electrical Code Forum)
Q. Are you required to bond existing gas pipe when installing a like-for-like change-out? 250.104
A. Yes.
(August 8,2002 Tri-County Electrical Code Forum)
Q. A contractor is replacing an oil furnace with a gas furnace that has new gas piping, and the disconnect remains in place: Is an HVAC/R-licensed installer permitted to bond the gas pipe, even
though it is a new gas-pipe installation? 918-282-0240
A. Yes. This is part of the installation.
(August 8,2002 Tri-County Electrical Code Forum)
Q. Is bonding of gas piping to all retrofit furnace installations required? The contractor says that some jurisdictions require it and others do not. 250.104
A. Yes, see Article 250.104(B). (Tri-County Code Forum, November 7, 2002-Approved by the state code chief for statewide application)
Q. Is it necessary to bond the gas system at the location closest to the entry of the house, or can a location near the furnace suffice?
A. Any accessible point on the gas system will suffice for bonding.
(January 23, 2003 Tri-County Code Forum; approved by state electrical code chief for statewide application)
Q. Do we have to bond the gas line when we put in a gas fireplace insert with a blower motor?
A. Yes. Gas appliances that have electrical equipment must be bonded. See NEC 2002, Section 250.104(B), Bonding: Other metal piping.
(Tri-County Electrical Code Forum November 20, 2003)
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