According to a recent Code Alert issued on September 23 by the National Electrical Manufacturers Association (NEMA), the Iowa State Electrical Board voted to adopt the 2011 NEC with amendments. The effective date is Jan. 1, 2012. Visit the NEMA website for a more detailed review of this adoption news.

Think you know how this installation violates the NEC?

Visit EC&M's website to see the answer.

Hint: Too close for comfort

Caught by the inspector!

Check out our newest Moving Violations video.

In this episode, Joe runs across a unique trash bin.

Q. What are the acceptable wiring methods for photovoltaic (PV) circuits inside buildings/structures?

Visit EC&M's website to see the answer.

When calculating the ampacity of a common neutral conductor installed as part of a circuit for an outside feeder or branch circuit, the ampacity of the common neutral conductor shall comply with which of the following?
Note: This applies to lighting equipment installed outdoors.

1. It shall always be the same size as the largest ungrounded phase conductor.
2. The maximum net calculated load current between the neutral conductor and all ungrounded conductors connected to any one phase of the circuit.
3. The maximum net calculated load current between the neutral conductor and the equipment grounding conductor.
4. The minimum net calculated load current between the neutral conductor and all ungrounded conductors connected to any one phase of the circuit.