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Commercial and Industrial Electrical | Forum profile
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Forum profile page for Commercial and Industrial Electrical on http://www.electriciansforums.co.uk.
This report page is the aggregated overview from a single forum: Commercial and Industrial Electrical, located on the Message Board at http://www.electriciansforums.co.uk.
This forum profile page summarizes the general forum statistics such as: Users Activity, Forum Activity, and Top Authors, which are reported in either a table or graph below for a given reporting time period.
Additional forum profile information for "Commercial and Industrial Electrical" on the Message Board at http://www.electriciansforums.co.uk is also shown in the following ways:
1) Latest Active Threads
2) Hot Threads for Last Week
Warning: These statistics are generated using 'best efforts' and can experience delays and reporting errors at times. Please note that such statistics do not constitute a forum's popularity and/or exact posting volumes at any given reporting period.
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Posting activity on Commercial and Industrial Electrical:
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3 Months
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Threads:
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13
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51
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167
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Post:
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45
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165
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460
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Commercial and Industrial Electrical Posting activity graph:
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Top authors during last week:
user's latest post:
Good practice wiring in...
Published (2009-12-18 12:33:00)
Skirting trunking has been taken off the shelves, generally as you need to stay within the 450 to 1200 mm heights for disabled access. If you already have skirting trunking there you MAY get away with it but it's a gamble in my opinion!
user's latest post:
3 Phase System
Published (2009-12-18 12:33:00)
Ya might get someone else to do testing as i dont have the equipment and havent done it since i qualified. Each machine is on its own circuit, New 6mm and 10mm swa cable used for the circuits 10mm just for the two big machines. Thing just has me baffled!!!
user's latest post:
3 phase starter/contactors
Published (2009-12-18 18:32:00)
Quote: Originally Posted by boatnik1 You can still check your continuity with the power off and manually pushing the contactor. You still need to establish that all phases are live going to the contactor and that the neutral is connected if the coil is 220/240v. By your description it's time the contactor was retired and replaced anyway. What sort of HP/Kw are we talking about. example -- Allan West starter/Isolator 230v coil. £20.00 +...
user's latest post:
multiplier on lighting
Published (2009-12-15 05:36:00)
Typically 1.8 mulitplier factor useally cover most case of discharge luminaires expect some electronic verison then I will drop it down to 1.3. Btw the 1.8 mulitpiler do work with both 50 HZ and 60 HZ discharge luminaires. { for DC verison Don't go there it a nutty spot to deal with it } Merci,Marc
user's latest post:
Making your own trunking double set
Published (2009-12-13 01:42:00)
Quote: Originally Posted by Notsosmart inside bend; cut out of one side a 22.5 degree V & leave back intact, folding one over the top of the other so you have an overlap on the sides ~ pop rivet or nut & bolt. Outside bend; cut off at 22.5 degrees then on one piece fillet the corners so the sides & back enter the other piece, then you flatten the back fillet to lie against the back of the other side, pop rivet or nut...
user's latest post:
Making your own trunking double set
Published (2009-12-13 01:42:00)
Hi. To be honest everyone has their own way of cutting and forming trunking and conduit and it's kind of hard to describe in words on here. There is a guide on e-bay that maight worth a look. A grinder with a super thin cutting disc, adjustable square, tape measure and felt pen are the essentials IMO. TRUNKING GUIDE,ELECTRICIAN,NOT BUSH SPANNER,NOT CONDUIT on eBay (end time 30-Dec-09 11:04:11 GMT)
user's latest post:
Good practice wiring in...
Published (2009-12-18 12:33:00)
Definately don,t tape in conduit but trunking yes .If you get a electrical spec.from a consultant you will probably find that it asks for cables in trunking to be grouped into circuits and also the circuits be identified where they enter and leave the trunking and also at 2mtr intervals throught the trunking run yours benji
user's latest post:
3 phase starter/contactors
Published (2009-12-18 17:32:00)
If there is just the one contactor then it's DOL (direct on line) and if there is no transformer in the enclosure the contactor coil will be either 380/440v off two phases or 220/240v off a single phase and neutral. If 220/230 check the continuity of the neutral to one side of the coil and live to the other. If the contactor has a cover with start/stop buttons on it, take the cover off and try pushing the contactor in with a stick, and...
user's latest post:
Making your own trunking double set
Published (2009-12-13 01:42:00)
Quote: Originally Posted by benji Total waste of time fabing your own sets ,good for practice but takes too long and they look crap compaired to manufacturers products.Most electrical specs.only allow manufacturers componnents anyway yours benji disagree.. a well made is a master-piece. I make my apprentcies do them as often as possible
user's latest post:
Making your own trunking double set
Published (2009-12-13 01:42:00)
They stopped teaching apprenti how to make there own sets?? When i was a lad you had to make them all yourself
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Latest active threads on Commercial and Industrial Electrical::
Started 3 days, 1 hour ago (2009-12-18 12:32:00)
by Eggster71
Sounds like a faulty contactor to me, if it has an overload then that could be at fault. Obviously being an old machine it's hard to say what additional safety mechanisms may be fitted, modern ones have switches to ensure the guards are in place.
It could also be an issue with an emergency stop button (if fitted) a loose connection in this will cause the symptom you describe, possibly a return ...
Started 3 days, 1 hour ago (2009-12-18 12:33:00)
by benji
Definately don,t tape in conduit but trunking yes .If you get a electrical spec.from a consultant you will probably find that it asks for cables in trunking to be grouped into circuits and also the circuits be identified where they enter and leave the trunking and also at 2mtr intervals throught the trunking run
yours benji
Started 4 days, 1 hour ago (2009-12-17 11:55:00)
by Eggster71
Beg borrow or steal an insulation tester mate.
It sounds like one of the phases is up the swanny. If it's the supplier's fuse going you'll probably be looking at either damaged tails or a fault within a DB or isolator. If you know what size the main fuses are then make sure you fuse down any fused isolators. Had a damaged underground submain a few years ago which took out the board's fuse and ...
Started 2 weeks ago (2009-12-06 14:53:00)
by Lenny
Hi.
The 1.8 factor is applied to the total wattage of the lamp.
Power factor is a very different beast concerning the True power, Apparent power, and Reactive power of a circuit.
Started 2 weeks, 1 day ago (2009-12-05 13:54:00)
by Lenny
Hi there.
The load of each lamp needs to be multiplied by 1.8 as they are discharge lamps.
Basically the 1.8 factor is to allow for the inductive nature of the load, the control gear needed to start the lamp (chokes, ballasts, auto-transformers etc) and also the power factor correction capacitors.
By multiplying the total load of the lamp by 1.8 then you are allowing for the effect of ...
Started 2 weeks ago (2009-12-06 14:54:00)
by benji
loose connections /contacts definately in need of thorough strip down/maintenance, this saw is unsafe
yours benji
Started 2 weeks, 2 days ago (2009-12-05 12:54:00)
by super_stuey
Wouldn't be so certain of that free chinky matey, tighter than a ducks butt
them lot!! Done a bit of work at our local, not a spare rib in sight!!!!
Started 2 weeks, 2 days ago (2009-12-05 12:54:00)
by zone77
i was recently asked to sort out a street light that wasnt working and found the light sensor was faulty so changed it and swapped lamp. now the lamp strikes on but doesnt stay on. is there a way to test for faulty ballast or choke? not very experienced with this stuff.
Started 1 week, 1 day ago (2009-12-13 01:42:00)
by ryanryan
Quote:
Originally Posted by benji Total waste of time fabing your own sets ,good for practice but takes too long and they look crap compaired to manufacturers products.Most electrical specs.only allow manufacturers componnents anyway
yours benji disagree.. a well made is a master-piece. I make my apprentcies do them as often as possible
Started 1 week, 4 days ago (2009-12-09 13:39:00)
by Lenny
Do they absolutely need to have RCD protection???
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Hot threads for last week on Commercial and Industrial Electrical::
Started 1 week, 1 day ago (2009-12-13 01:42:00)
by ryanryan
Quote:
Originally Posted by benji Total waste of time fabing your own sets ,good for practice but takes too long and they look crap compaired to manufacturers products.Most electrical specs.only allow manufacturers componnents anyway
yours benji disagree.. a well made is a master-piece. I make my apprentcies do them as often as possible
Started 4 days, 1 hour ago (2009-12-17 11:55:00)
by Eggster71
Beg borrow or steal an insulation tester mate.
It sounds like one of the phases is up the swanny. If it's the supplier's fuse going you'll probably be looking at either damaged tails or a fault within a DB or isolator. If you know what size the main fuses are then make sure you fuse down any fused isolators. Had a damaged underground submain a few years ago which took out the board's fuse and ...
Started 3 days, 1 hour ago (2009-12-18 12:32:00)
by Eggster71
Sounds like a faulty contactor to me, if it has an overload then that could be at fault. Obviously being an old machine it's hard to say what additional safety mechanisms may be fitted, modern ones have switches to ensure the guards are in place.
It could also be an issue with an emergency stop button (if fitted) a loose connection in this will cause the symptom you describe, possibly a return ...
Started 2 weeks, 2 days ago (2009-12-05 12:54:00)
by super_stuey
Wouldn't be so certain of that free chinky matey, tighter than a ducks butt
them lot!! Done a bit of work at our local, not a spare rib in sight!!!!
Started 3 days, 1 hour ago (2009-12-18 12:33:00)
by benji
Definately don,t tape in conduit but trunking yes .If you get a electrical spec.from a consultant you will probably find that it asks for cables in trunking to be grouped into circuits and also the circuits be identified where they enter and leave the trunking and also at 2mtr intervals throught the trunking run
yours benji
Started 2 weeks, 1 day ago (2009-12-05 13:54:00)
by Lenny
Hi there.
The load of each lamp needs to be multiplied by 1.8 as they are discharge lamps.
Basically the 1.8 factor is to allow for the inductive nature of the load, the control gear needed to start the lamp (chokes, ballasts, auto-transformers etc) and also the power factor correction capacitors.
By multiplying the total load of the lamp by 1.8 then you are allowing for the effect of ...
Started 2 weeks ago (2009-12-06 14:54:00)
by benji
loose connections /contacts definately in need of thorough strip down/maintenance, this saw is unsafe
yours benji
Started 2 weeks, 2 days ago (2009-12-05 12:54:00)
by zone77
i was recently asked to sort out a street light that wasnt working and found the light sensor was faulty so changed it and swapped lamp. now the lamp strikes on but doesnt stay on. is there a way to test for faulty ballast or choke? not very experienced with this stuff.
Started 2 weeks ago (2009-12-06 14:53:00)
by Lenny
Hi.
The 1.8 factor is applied to the total wattage of the lamp.
Power factor is a very different beast concerning the True power, Apparent power, and Reactive power of a circuit.
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