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Please can someone help and explain wiring a 3 phase motor, as I can't really find anything in laymans terms. For example, a motor like this: http://www.electricneutron.com/wp-content/uploads/2011/04/nameplate-voltage.jpg If running through a contactor, I would wire it in Star If running...

How and why would a motor pull less current than is stated on its name please? The motor is attached to a pump, which is underground and pumps water. The flow from underground/the pump is very poor, and is only pulling 10A instead of 15A. How is this possible? In my very limited experience...

Hi, I am wanting to install a car charger at a place of work, which will be outside, approx 5m from the building. According to the IET Code of Practice, for the earthing system, it needs to be either TT or TN-S 'as long as it can be guaranteed that by the DNO that the TN-S system is TN-S back...

Hello, I'm hoping someone could give me some pointers/help with a small, simple circuit (although not too simple as I don't understand it). The point of the circuit will eventually be to control a pneumatic arm to divert product on a conveyor. In 'manual mode', it is very simple, and will work...

Hi, Where I work there was 3 reported electrical shock accidents (all minor), and the owner of the factory would like this number to be zero which is understandable. So, I've been given the task to count up how many RCDs/RCBOs we need to buy in to make all the circuits safer, Some are quite...

Hi all, I'm hoping someone might be able to answer a few queries I have. I've not been involved much at work with regards a new machine which has been purchased, but have noticed a few things which don't seem right on it, so we will be going back to the makers to complain. For example, when...

Hi, On a compressor at work, it needed to be E-Stopped, which should trip out the main Switch Disconnector...only it didn't. The E-stop is on a 24v circuit, which only goes to a shunt trip, in the main Switch. So 24v -> E-Stop -> Shunt trip -> 0V. Upon investigation, it seems if you...

Hi, Mr Inexperienced here again :) I'm not doing this job, but a colleague is at work, and I don't think he is using the correct cable type really....... He is running a cable from a DB, along a beam approx 20m, through a brick wall, and then clipped on a metal barrier, then up a 'lamp...

Hi all :) I am hoping you guys could help me out with something. I'm wanting to add a small circuit to an existing panel at work, as recently there was a leak from a hot oil pump, and it had the potential to catch fire (there was lots & lots of smoke). So I'd like to fit a smoke detector...

Hi All, Just a few questions I'm not too sure about. 1. The majority of the time, if running 3-phase, 400v, you would connect the terminals in the junction box in Star, and single phase, with Capacitor would be in Delta. (I'm trying to describe the formation of the brass connectors across the...

Hi all, I have recently started a new job (recently qualified maintenance tech), and we have had a thermographic survey done. There were a few issues like loose connections on MCB's, which mean't the current was too high, and hence too hot too. These were easily solved, but there is one issue...