Are dry type transformers with expanded metal bottoms suitable for installation...

Question: Dry type transformer Are dry type transformers with expanded metal bottoms suitable for installation on combustible floors? Answer Dry type transformers with expanded metal bottoms are...

NESC Substation Grounding

I have written several times in theIAEI Newsabout the hazards associated with substations and some of the easy ways to understand NESC requirements for...

Canadian Electrical Code Revisions: Grounding and Bonding Requirements

The new 19th edition of the Canadian Electrical Code has brought about some changes in the grounding and bonding rules. Not many of these...

AFCI Troubleshooting

Although not required by UL Standard 1699, all of the listed branch/feeder arc-fault circuit breakers currently available also provide a certain degree of ground-fault...

Update on NFPA 79, 2002

NFPA 79, the Electrical Standard for Industrial Machinery 2002 edition, is scheduled to be published in October 2002. During this past cycle, NFPA 79...

3rd Harmonic Blocking Filter: Is the Cure Worse Than the Disease?

It is commonly known that conventional transformers and neutral conductors can become overloaded and hot due to harmonics generated by computer equipment and other...

NESC Substation Grounding – Part 2

The almost two hundred pages and ninety five equations of IEEE Standard 80-2000 provide a well explained procedure for the design of safe and...

“Yesterday things were different…Today, they are different again.”

The opening line from a southern gospel music song by the Cathedrals has special meaning for me at this point of my life. Yesterday,...

Recessed Lighting

There is an increased fire hazard when recessed lighting fixtures having external temperatures in excess of 90ºC are installed in contact with thermal insulation...

A Personal View

A successful organization must be capable of adjusting to meet changing circumstances. The IAEI has been able to meet challenges placed on it and...