Happy 2010 and welcome to our first newsletter of the year. Featured in this issue are animations on grounding, fun activities, and our new Question of the Season.

Remember to contact us at: newsletter@jadelearning.com if you would like to share an experience, idea, or installation tip with other electrical professionals.

David Burtt, JADE Learning

Have you ever wondered why the two flat prongs on plugs have holes in them?

Click here to find out.

Grounding A Service

Click the image below for a quick review of bonding and grounding a service with multiple enclosures. See how the conductors are sized and installed according to Article 250 of the 2008 NEC. The demonstration shows the correct size and placement of the grounded neutral conductor, the grounding electrode system, the bonding jumper on the supply side of the service, and the main bonding jumpers in each enclosure.

Question of the Season

What is the minimum size grounding electrode conductor required for a service that is supplied by three, 500 kcmil ungrounded conductors per phase?

a.) 1/0

b.) 2/0

c.) 3/0

d.) 4/0

Know the answer? Email us at: newsletter@jadelearning.com. The first two people to respond with the correct answer and their name and mailing address will receive a prize from JADE Learning.