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Hi guys I’m at one of the funny times in my career where I can’t decide on what I want to do. I’m wondering if one of you experiences folks can offer some advice. Here’s a bit about me: I’m now 27, I did an apprenticeship in mechanical engineering 17-21 a lot of metal work fabrication welding...

Hi guys, I’m wondering if you can help. I’m looking to get on site and switch from maintenance to installations and require a ecs card. At the moment I can get the JIB gold card as a maintenance electrician with my quals, but have been told by the company I will be doing work for to go for the...

Hi guys wondering if you could point me in the right direction. I’ve had 5 years +experience within the electrical industry. A lot has been electrical maintenance but also have experience with domestic and industrial installations. I have the following qualifications: HNC in...

Hi guys I’ve got a weird one that I’m hoping you industrial guys may be able to help with. I’ve had this fault on a motor that drives a blower unit via belt. I first arrived and saw that the motor would not ramp up to speed and end up tripping. I then replaced the belts on the motor and tested...

Hi guys just wanted abit of advice I currently have my 18th edition, 2391/2 testing and inspection and a Level 3 NVQ in engineering maintenance (electrical). I’m also one year through doing a HNC in electrical and electronic engineering. I’m a bit stuck as from what I understand if I’d completed...

Hi guys, not something I know a lot about but my parents have recently had a system fitted. The inverter is fed by a 20amp type B breaker feeding a submain. Does this backfeed somehow back into the system? My second question is it displays over 6.5kw and trips the breaker every 3 hours or so...

If you have a TT island does the earthing conductor have to be 10mm or 16mm if unprotected? I know it can be 2.5 if mechanically protected and protected against corrosion.

I’ve got a temporary 22Kw motor running on a 63amp isolator. Think the isolator is rated AC3 for 11Kw . If the isolators not being used to switch the load is this okay?

Hi guys I hope this is the right section for this post. I was looking for a-bit of advice regarding experience and training. I’ve been in electrical maintenance for almost 5 years now. My qualification is engineering maintenance electrical NVQ 3. I’m also studying towards a HNC in electrical...

Hi guys I just wanted a bit of an insight to how we apply this to cable in industrial MCCs. Say if we have a panel with a motor starter in and control wiring all put inside plastic panel trunking do we still need a de-rating factor? I know most Tri rated is rated for 40degrees ambient but when...

Hi guys There’s an outside panel at work with an IP rating of IP55 when the doors are open in the enclosure the main panel for the equipment can be operated (start stop for motor operation. The trouble is the main enclosure door has blown off leaving the panel exposed to the elements. My...

Is there a way you can calculate inrush current in a transformer I’ve got a 230-110v 3Kva transformer that’s I think has been installed on a breaker that is too small (16amp type c)

Hi guys just a quick question to verify my thinkings right my parents have just brought a swim spa so I know there is various motors being used to produce the jets. I have noticed on start up to these the lights in the house flicker this would be to the Voltage drop due to high inrush currents...

Hi I’ve got 2.5mm t&e on a 16amp breaker run through a thermally insulated wall what is the current carrying capacity calculation for this is it 0.5 of the clipped directly rating so 34 so 17amps?

Right I’ll be honest I’ve never wired up storage heaters but I’m looking to buy one for my house I have an economy 7 meter so thought I’d make the most of this. However looking into this it requires two supplies 24hr and off peak. Is this always the case or can these be wired off the 24hr supply...

Hi guys Im not sure if this one’s covered by BS7671 but do you know what labelling is required if you have a panel with multiple 110v control signal in supplied from different supplies?

Hi guys Im not sure if this one’s covered by BS7671 but do you know what labelling is required if you have a panel with multiple 110v control signal in supplied from different supplies?

I have an interesting one regarding a 110v transformer. It’s a 3Kva 230v - 110v centre tapped transformer. This circuit is supplied by a 16Amp type B transformer that feeds a trace heating panel. This breaker intermittently trips the breaker on start up. My thoughts were due to inrush but...

I’ve seen it a few times where the swa has been used to earth a motor but they are relying on the locking nut of the gland to earth the motor. When carrying out maintenance I’ve tested the connection and I get 0.00ohms on my low ohm meter from the panel earth to the motor case. Realistically is...

Two questions regarding best practices. First one I don’t know if I’m being OTT but would you lock off a tripping circuit if you cannot investigate at that time? The second is regarding maintenance and removal of motors. If the motors been removed and awaiting a replacement what would you say...