Determine the minimum cable size for a 28A single phase final sub circuit originating from the distribution board supplied by three phase submain. The route length of the final sub circuit is 54 m. Assume 1% voltage drop in the consumer's mains. Submain specification: Cable: 50mm2 4 core V75 copper; Route length 42m; Maximum demand 135A per phase1 3869
what is difference between 2wire method and 4wire method of winding resistance testing of transformer?1 2160
What will happen if " not connecting the neutral point to ground of diesel generator output (380 V)", also if someone touched one phase without isolation from ground during the A/M condition what will happen to him?3 4551
what is metering cum synchronizing panel and how it is used?3128
what is the value of current as well as voltage upto which we will not feel shock and why?3 3946
sigal phase supply is 230 v ac two phase supply is 415 v ac why three phase supply is 415 v ac why not 690 v ac4 6323
How to connect the earthing in aircraft?1 4118
what is the difference between linear choke and suction choke?
Before i went to bed my master bathroom lights were working fine. At 2 am, when I went to use the lights, none of them were working. The outlets throughout the bathroom work, but the lights and fan above the toilet don't. I have two panels of switches. The one panel has four switches. One of the switches turns on the hall light, and that works. The other three are to other lights, and they don't. The other panel has three switches. One of those is to the fan, and the other is to a light above the toilet. The other is a to light that is also on that other panel. I tried the breakers, and the one that turns off the outlets, marked for the bathrooom, turns on and off the outlets. None seemed to be tripped. I checked the lightbulbs, and they are fine. Please help2 3387
please send me privious exam's queation papers of section engineer(electrical).
If there is volagte between earth and neutral, what should be the reason ? and solution * What should be allowable limit in case, if the voltage between earth and neutral exist ? / OR what is limit for safe voltage between earth and neutral?3 4606
what is the diff. between power transformer & distribution transformer.....5 9247
Zone of protection and tripping scheme of arc protection relay.
BSNL TTA EXAM QUESTION
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