Mike Holt

Mike
Holt
Articles
Code Q&A
Q. Must metal siding and metal framing members be grounded? A. The NEC doesn’t specifically require metal siding or metal framing members to be bonded (not grounded) to an effective ground-fault current path . However, exposed structural metal that ...
Grounding vs Bonding — Part 3 of 12 1
Grounding and bonding at service equipment
Code Quandaries 1
Q. What is the maximum number of 15A or 20A, 125V receptacle outlets permitted on a 20A, 120V general-purpose branch circuit in a commercial occupancy?
Code Q&A
Q. I’ve been looking online, but I can’t seem to find a consistent answer on whether a television antenna placed in the attic needs to be grounded. Does it? A. No. Each lead-in conductor from an outdoor antenna must be provided with a listed antenna ...
Code Q&A
Q. Can a 15A or 20A, 125V receptacle on an elevated dwelling unit porch serve as the required outdoor receptacle outlet? A. No. According to 210.52(E), one 15A or 20A, 125V receptacle outlet is required at the front and back of a dwelling unit. Such ...
Grounding vs Bonding — Part 2 of 12
General requirements for grounding and bonding differ
Code Quandaries
Stumped by the Code?
Code Q&A
Q. Can service drop conductors be supported by trees? A. It all depends on who installed the conductors. If the installation is under the exclusive control of the utility, then this isn’t a violation of the NEC. However, it might be a violation of the ...
Code Q&A
Q. Does the Code permit a circuit breaker to be installed horizontally? A. Enclosures that contain overcurrent protection devices must be mounted in a vertical position unless this isn’t practical (240.33). However, where circuit breaker handles are ...
Code Quandaries 1
Stumped by the Code?
Grounding vs Bonding Part 1 of 12 1
Safe installations start with a basic understanding of grounding and bonding terminology
Code Q&A
Q. I heard that the Code only permits one equipment grounding (bonding) conductor to terminate on a grounding block screw terminal. Is this true? A. No. The number of equipment grounding (bonding) conductors permitted to terminate on a grounding ...
Code Q&A
Q. I have a panel that contains a circuit breaker for air-conditioning equipment. If the circuit breaker in the panel is within sight of the equipment, am I required to install another disconnect near the air-conditioning equipment? A. Not if you comply ...
Understanding The Basics of Wye Transformer Calculations
Add this information to what you know about delta transformers and you may be ready to solve power quality problems
Code Quandaries
Stumped by the Code?
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