Recent content by Lightman

Have seen a light that screw into a keyless socket, with a round globe and leds , life of 32 years, when screwed in the base is flush with ceiling and covers the socket

Square D "Homeline" or the "QO" line. Or the Square D homeline with the integrated neutral connection for the Arc fault breaker without pigtail? (Old retired guy working at Lowes part time seeing new panels and breakers. )

Load Diversity, Ex Utility, common in this area to size outside equipment example 200 amp main, all electric house, heat, air, water heater, stove, house service equipment (Transformer and wire) sized for 60 amp continuous. Other words using your 100 amp Watt loading 24000 @ $.10 per Kwh, and...

http://www.iceqube.com/thermoelectric-heat-sinks/ have used something like thi sin electric substation electronic cabinets. orginals had compressors, replacements all electronic.

I your situation, can the 480 volt machines be converted to either 120/240 or 120/208. this would elemnate the step down transformer cost. Possibly a 277 / 480 V. would get the result cheaper?. Smaller transformer for security 24 / 7. Switched transformer for working hours for computers, and...

The neutral? 480 corner ground has two pole breaker, ground and neutral tied to one phase, (breaker not to break Grounded phase) four wire would be 240/480 four wire. 240 volt stuff connected to phase to ground two phases , wild leg for three phase stuff, three pole breaker. More common to use...

Wyliediesel, you are right open y delta can be either three or four wire service, depends on customer if he has two or three pole breakers and equipment?, I guess. I have built both per customer request and work order???? Have used the the open Y-Delta when there are only two phase line close...

No need for the fourth cutout if Delta high side, Delta or Y secondary. And only need fourth switch on Y - Delta connection. Y-Y always grounded, no fourth switch Also fourth 480V service ,, open Y-open Delta using two transformers, 240/480 four wire with wild leg, and corner grounded three...

Convential two bushing high side, only one phase connected to each H1 of each transformer, H2 bushing tied together , with temp cutout for switching, to temp ground center of high side Y. If delta connection each phase would commect to H1 and H2 of each transformer. making it Delta - Delta...

See comment in other post, fourth cutout is a solid blade to temp. ground the center of the Hi side Y connection, making a open "Y - open Delta" two transformer bank, when opening and closing the three other high side fuses. Built and worked on many of these banks.

The fouth cutut is a solid blade, this is connected to the "center point" or ground of the high side "Y" connection. only closed when closeing or opening the three other primary fuses. when this is not allowed to float, when connected to ground you may get either a back feed out of the bank to...

American Loco. Thanks for the lesson. There are 2 CT's on the incoming line running to the meter, I'll have to look over the bill to see if they make mention of how its calculated. Had simular situation at job while working. Idea to downsize the step down for the devices that require 24/7...

that meter base lever is a meter by-pass not a loadbreak or disconnect device, also clamps the jaws to the meter prongs.

To cut PVC like that , I have used mason twine (especially dirty, used, mason twine) to saw through the conduit, up to the wire then pull string out and back through other side of the wire, then cut rest of the waythrough the conduit. No damage to the wire. Try it on your bench some time...

http://www.jharlen.com/ups385-pole-chain-sling.html