QOD for 11/18/06 Electrical

[gbeaumont]

Hi to all,

here's todays question

Picture courtsey Ben Kelly

Regards

Gerry

[gbeaumont]

Hi to all,

I guess that question was way too easy, the correct answer is:

3 Phase supply

Regards

Gerry

[jtedesco1]

Gerry:

I see a smaller grounded conductor in the picture [2nd from top left] that is identified with white tape, so we should be calling this as a:

3 phase, 4 wire supply, 208Y/120 volts often called either a "Wye" or "Star" configuration.

I wish I still had the link where someone posted the 2005 NEC Handbook for download, that publication would be very helpful because it gives diagrams showing these configurations.

The most recent changes in the code require identification of the exposed conductors to be sunlight resistant, with the permission to use tape or sleeving when listed for that purpose by a qualified testing laboratory.

PS: If this hand was extended while standing on the ground the: "drip loop" is too low, it is not allowed to be less than 10 feet in that area.