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bignev, you have clearly gone to great trouble to ensure that this installation is neat safe and well designed which is great to see. Q1. There are complex formulas for working out the exact size cable required for certain loads. However as far as you are...

Somehow i think not :!: Some prankster has gone and set up a similar name for the crack methinks :)

perhaps, if you had a meter with 'inrush' capability. but i fail to see the purpose. A megger or even continuity test will show up a 'current leakage'

this is a uk forum an so most of us will know little (or in my case nothing about electrical systems in Singapore) however a few questions all the same. 1. Are you sure your lights are wired into the ELCB? it is not common practice here and could cause flickering. 2. How old is the house...

The 4 yellow/green are earth wires (i assume). God only knows what they are for! Simply join them all together and tuck them out of your way. Then connect the two reds into the two terminals on the new switch. (Doesn’t matter which is which) Ensure you tighten all connections securely. Test...

I don't understand what you are saying, melt what? do you mean shorting out the supply cable when cutting it? But my question was: i believe megger testing some fire sounders will "totally destroy" them, is the same true for security systems (i.e would this work)

The above is similar to the situation in ireland, to be honest i would be very suprised to find a public lighting lighting ring protected with a 1200A fuse although these do exist.

a wholesalers near me was broken into recently, which had a relatively modern alarm system. Apparently the system was disabled by meggering the main supply to the building with 5000V! Sound possible?

1) Yes 2) If possible, i would use two separate DP switches, for the purposes of good design at least. Although there is nothing stopping you from using one. 3) Correct 4) If you were to have separate supplies: although 2.5 would have the current carrying capabilities, it would be...

diynot site admin seems to have forgotten!

i have had one on order for the past 6 weeks. It is one of 2 'exciting new items' which i am awaiting delivery of next week. They certainly look good and is going to fit my new kitchen well but at €7,200 are a little steep.

heres where i have to back down and admit that i must be doing somthing wrong. But at 58 i've done well to get this far! Interesting to know that what you say can be done.

Thank you for your reply breezer. It's a topic I always found interesting and as FF we were only shown how to activate and silence the alarm. Hence by lack of knowledge! I actually spent two summers working for GENT as a youngster about 14/15. It’s surprising what you remember, but things have...

i know i'm really starting to annoy you with questions but a final one. I am thinking of a fire alarm panel like this: Key Switch Normal / Arm Controls 4 Buttons Reset / resound ...... silence sounders evacuate...

thanks very much for your detailed reply breezer, just out of curiosity, if one managed to trip the mains supply and disconnect the back-up battery leads without coming in contact with sensors etc. is the alarm useless. I know that 'spring switches' are used on some of the boxes etc. so this...

i would be very wary of doing as you say, it is certainly not recommended (by Microsoft or any other manufacture) to reinstall one copy of windows over another. The risk of corrupting files is high Maybe I’m picking this up wrong, but is this what your talking about: Lets say I have win 98...

First of all wildcat, you have to decide whether you are up to the job. This is by no means a simple and straightforward task and mistakes cannot be made. If you feel you are competent to do this work yourself post some details of your general situation here and we will be glad to help. In...

Is the tamper just a single core in the alarm cable which if cut will put the panel into alarm? So if you knew for example that the tamper was purple, and cut all other cores in the cable except purple, you could disable the device. Is this true, or have I got it completely wrong?

this should read neutral, so as to be absolutely clear. The point i was trying to make is that a three-phase system is perfectly capable of supplying single-phase apparatus at 230v. Above post has been edited.

EURO, Actually :lol: But i agree with what you are saying.