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Hi All, been to look at connecting an old three phase motor today. It is 13.4kW and is a PAM (pole amplitude modulation) motor, meaning it can have two speeds but only has one set of windings. These motors are a new one on me, and I am wondering if it is possible to start these motors on...

Hi, I have a customer who has airband going to one house currently, and wants to split it to another house at the same site (its a farm with 2 cottages) Is there any reason why I cant do what is shown in the drawing attached? Basically the airband dish and power supply is currently at the barn...

I want to set up a ammeter to monitor current on a circuit, using a CT. Current should be around 25A (240V). I can't get my head around which ammeter and CT should work. Looking at a couple on RS, can someone guide me as to how to choose two which are compatable? Thanks...

I have just fitted a 4kW invertor to a 3Kw three phase motor which runs a conveyer. All settings are as it always use to be when it was DOL with a running speed at 50hZ. All was fine for half a day, and now the invertor is tripping out on overload about once an hour. The conveyer only runs for...

Why would an electronic ballast go faulty when removing a tube?

Customer has a saw which has a small motor which from looks of it has two sets of windings/poles for two speeds. It can be operated manually or as part of a program using the PLC. However it is operated it is the same thermal overload and contactors which operate. It is tripping the thermal...

I fitted some 6ft Philips TL-D Super 80 tubes to some fittings, which had Osram Quiktronic QT-Fit8 electronic ballasts. On fitting the tube the ballast popped and that was the end of it. Tried putting the old tubes back in (which were working before removing) and they were also dead. I tried...

i have a job rewiring an old ship - it currently has lead sheathed cable with what looks like a single core with perhaps a cloth insulator? It dates back to the 1940’s. Originally it was all 110v dc. The lighting has now been converted to 24vdc and The customer would like to keep a lot of the...

I have a 20W Solar panel system which charges a 7AH Lead Acid battery. This works fine when no load is attached to the battery. We are then connecting a electric fencer unit, which is 12V 200mA. This load is running 24hrs / day The solar panels are not able to keep the battery charged up, and is...

i have a new megger 1721 (always had fluke before). Today I did a 3 wire low current loop test and got 0.30. Then tried 2 wire low test and got a reading of about 2.30. Why’s it so different.? Thank you!

I need to put a supply in for a 22A FLC 3ph motor (fan unit). Cable length is about 100m. I am not sure on the motor connections as inside the terminal box there is just the 3 line conductors, and no options to fit star/delta links. What would be the maximum permissible volt drop on start up...

I have this motor, 5.5KW as a replacement for an existing one on a large fan. This new one was connected DOL in Delta, and was pulling 80A ish on start up and taking out the overload. It has now been connected in star to get it running, but according to the plate I believe it should be in...

http://www.telegraph.co.uk/news/2017/03/17/man-died-charging-iphone-bath/

customer of mine has a 12kw instant heat water heater in a small cabin for kitchen sink and shower. It needs a flow of at least 3l/min to turn on. We have set the stop cock to get this flow rate and it turns on ok and gives adequate water of around 40oC. Trouble is if it's left over night etc it...

house supply is tn system 6kva Generator is to be used as a backup. The generator chassis is connected to the chassis of the generator. There is no connection between neutral and Earth on the generator. The picture below is how I believe it should be connected but would appreciate if this...

I'm looking for a good quality LED linear fitting. Must be dimmable, and have an emergency version. Probably 5 or 6 foot. Any recommendations?

I am currently pricing for new lighting in a village hall. Would LSF cable be required? Advise on who should be contacted please. Also, regarding the amd 3 requirement for fire rated cable supports, what would be recommended for above a plasterboard ceiling cables being clipped to joists, is...

I am looking for a fan to go inside a bread proover in a local bakery. (Machine is very old and spare parts unlikely to be available) It needs to be about 140mm diamater I have looked at oven fans but the blades obviously will not pick up the air and blow it out the top due to the design of...

Im talking about someone who dislikes sheds... ?

Can an earth rod be inside a building? Did a test on a property and the old earth rod (tt system) is now within a small extension they had built. It's reading is spot on 200 ohms, I am tempted to get pme connected as it is available.