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  • Question
I have a single phase system that uses 320 amps and 240 volts and I rewire the circuits for 3 phase what size generator would I need and how many...
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91
Hi all, We've been asked to upgrade 450+ 6ft single fluorescent battens to LED. The client had requested for each fitting to be connected into...
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1
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96
Edited - please read right to the end! Grateful for any advice regarding CT metering which seems to be generating inaccurate/implausible...
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23
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395
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I have been through a time served electrical apprenticeship, achieved LV 3 2330, AM2, NVQ, and all other stuff to do with, 6 years ago. I do not...
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10
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17K
I've lost touch a bit with permanent install generators and combined AMF controls over the last 3-4 years - what Manufacturers are people using...
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4
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263
Just had a call from an M&E client of mine and good mate asking to pick my brains.... large 3ph biomass boiler with (I assume variable speed)...
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2
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212
Across the pond in the US we allow utility-owned transformers to be tapped up to six times but an identically set up customer-owned transformer to...
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20
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784
  • Question
Hi there, I got a call to a job, table saw (wood) tripping C/B straight away. 4kW motor on Star Delta Starter. So I get to the job, after some...
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2
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623
Here’s something I’ve never thought about until now…. So, we use the adiabatic to return an S based on the usual parameters and for arguments...
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7
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426
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I am servicing a machine that uses a 3 phase power supply. Some of the components (motor, compressor, fan) use 3 phase power. Other components...
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15
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4K
well i have seen it all ,so the story begins a customer ring up asking me to install some cctv for her and husband is mostly bed bound ,so the...
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1
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307
Hi I got called out to a faulty star delta starter on an old Stenner band saw Monday (was getting stuck in star and blow fuses) - So I ordered a...
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19
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715
Hi everyone I have a job that requires a 63a 1ph supply to a small unit, the main distribution panel is a Crabtree Powerstar. I am struggling to...
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0
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236
I'm going to need to make some 'temporary' UPS systems next year - I'll have to find possibly some rack mount units that can live in an outdoor...
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3
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237
Hi All I am new on here and looking for some advice on converting a car ramp to single phase. This particular ramp is sold in 2 versions single or...
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6
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560
Hi all, looking for a bit of advice and confirmation on my proposed plans for a SWA sub main to a ISO metal storage container. I've calculated the...
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23
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968
Just sat contemplating life and realised i don't think i've ever seen any RCD protection on the boards we maintain/install at work. I've seen...
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6
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626
Ive never used the stuff but would like to hear others opinions?
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43
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10K
So Allianz insurance inspector has pulled up a C3 ( I know it’s not mandatory) about magnetic effects from a circuit. so we have a small 9-way...
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7
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469
I've an M&E client who wants me to replace a whole load of 'tired' 5v panel lamps on BMS systems for LED. My spidey sense is pricking my brain...
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4
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384
Hi I have a 3 phase 400v motor wired in star configuration it is controlled via a 3 pole 415v coil contactor which is switched simply via a stay...
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3
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524
Hi, I’m a bit new to this and I understand how to wire thru a grid key switch for emergency lighting but could someone please explain or show a...
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20
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1K
I am currently running around the country completing remedial work on the back of EICR's and have came up with a confusing pair of C2 faults as...
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12
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656
Due to a damaged underground SWA that would normally feed a sub main, I may have to place a genset temporarily to run a small kids funfair area at...
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2
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419
OK.. I have a faulty RCD to replace as seen on the photo. It feeds a 32amp ring circuit, in a commercial premises on a 'TT' supply. Ze=37.6...
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0
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333
Thanks for the interest in my earlier question. I have just paid my DNO a lot of money to install a 3-phase connection with a maximum load of...
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11
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890
I am drawing up a contract for a job in a domestic property which has a 3-phase Distribution Board and need to supply 3ph to a heat pump that's in...
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3
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400
I've been watching Residual Current on youtube (great vids and great bloke btw) and really love watching the more industrial/commercial side of...
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20
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658
Hi All I haven't done any 3 Phase work for some time but I have just been asked to wire up a new woodworking workshop. There will be 6 - 7, 3...
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5
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848
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I presume L is live and N is neutral, but what does D mean?
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6
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6K
I am looking at installing electrical supplies for a series of equipment that form a DPF test bed. There will be five individual machines needing...
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14
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974
Hello, wanting to install a new (old) MCCB in an Dorman Smith Loadline board, found a couple online, however, the client ordering the works is not...
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2
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568
I am a Maintenance man. I also hold a journeyman's license. but I am at a loss on this one. I have 2ea 50 hp air compressor. Both seem to be...
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3
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751
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Hi, i am attempting to do the 2396 exam and in the process of doing a practice paper. Qu. A distribution circuit is to be installed using a new...
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12
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3K
Good morning , i am about to set up a pop up shop in a shopping centre. In order to do that i need to provide them with a power draw of the...
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4
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591
I have a workshop in a remote location which I rent out. The incoming supply is 3 x 16A three phase on 180m of 16mm SWA. An upcoming customer has...
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18
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2K
Good afternoon all, Our company installs fire alarm systems in convenience stores but it's always limited to a conventional system whether it be...
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4
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605
I need to install a kill switch/bang button that will kill up to six single phase circuits over three phases. Is this possible using one switch?
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6
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607
Hi I work for a Manufacturing company based in Cheshire East, in our factory we have a 1940's era 10CWT Lift manufactured by Evans Lifts - which...
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16
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1K
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