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Monthly Archives: November 2011

Inspecting PV Systems

Plan Reviewers and Inspectors. What Do You Need? Photovoltaic (PV) power systems are becoming more numerous, larger and more complex. Inspectors and plan reviewers have...

When good ’nuff defeats the Better

When my car began to run hot recently, I took it to a local garage with the hope that the repair would be simple...

Certified Ceiling Grids that Power Lighting Systems

Question Does UL List (certify) powered suspended ceiling grids that power lighting systems? Answer Yes. UL certifies ceiling grids that power lighting systems under the UL product...

Maximum Circuit Loading

Maximum circuit loading is a recurring theme in the Canadian Electrical Code. Some of the code requirements are not entirely obvious without some head...

It’s a PV World After All

The harvesting of the sun’s power has increased in popularity to a point where an inspection or installation of a solar application is probably...

Installation of fire pumps — a bit of new information

This subject is not new. There have been numerous articles written about the CE Code requirements for fire pump installations and about the selection...

Both dc and ac photovoltaic systems in a common enclosure?

Question Where conductors from both dc and ac photovoltaic systems utilize a common junction box or other enclosure, are there any special identification requirements for...

Ohm’s Law and Torque

In the course of my travels for many years now, it has become apparent that most electricians don’t understand Ohm’s law, watts and torque....

Introduction to Electronics

We learned about fundamental atomic theory in the January issue. Protons and neutrons reside in the nucleus. Electrons revolve in orbits or more appropriately...

Grounded in Gratitude

Photo 1. Does this installation meet code? Yesterday I got a call from a friend who thought he had an electrical problem at his home....
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