We've just encountered the requirement for this in the 2012 International Building Code Section 3007.6.2. This requires the entire shaft to be lit to min 1 foot-candle measured on top of the car when firefighter's emergency operation is active. How is anyone achieving this these days...
It's done all the time in commercial HVAC equipment. Was just looking inside the control box for a gas unit heater the other day. Ignition transformer & all control electronics in same metal box.
I've actually asked several circuit breaker manufactures if handle ties will ensure automatic tripping of the connected poles. They all agreed...maybe. So essentially handle ties are good for multiple single phase (phase to neutral)circuits sharing a neutral but not three phase loads.
Unclebob, I have to agree with you.
100E will probably limit your transformer loading capacity.
Here's a link to another S&C guide I use.
It's a large file and you may have to extrapolate for a 5000kVA.
http://www.sandc.com/edocs_pdfs/EDOC_006526.pdf
Anyone have any experience with Baldor Generators? The local sales rep made a pitch for them a couple of years ago and we've been asked by the electrical contractor on a project if we would accept one. I know they've made fine motors for decades but haven't seen their generators installed in...
Regarding mechanical type lugs; I've been hearing the exact opposite from the cable manufacturers. They recommend not retorquing aluminum ever. That being said, we allow aluminum as a value engineering item from contractors for larger wire sizes, but require compression lugs or compression...
Have you considered using a cheap AM "transistor" radio as a detector and a small chattering relay (wire the coil through the NC contact to a 9V battery) as an RF generator. I've done this several times with good results. Connect the "transmitter" to the wire in question, tune the radio to an...
I would normally write ... 4 sets each: 3#500, 1#4/0G - 4". Pretty obvious to me and never been questioned. And no I don't write MCM or kcmil for that matter. Still think kcmil sounds like the name of a country singer.
My 30 year old vacuum cleaner and 25 year old drill both have universal motors and have always had a fair amount of sparking. Both still going strong. Haven't replaced the brushes yet.
Adding a generator to serve the entire load of a building. The intent is to intercept the underground service (multiple sets of 3 hots & grounded neutral in PVC ductbank) between the utility padmount transformer and the switchboard inside the building and install an ATS oudoors. This ATS will...
