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not broke (yet) just 20 years old, very straight forward job. Boiler in kitchen and all pipework that needs replacing is accessable, just a matter of lifting some floorboards

you have won the contract then :D

yes all that included

just would like to have some guidence on this please. i want to upgrade my boiler due to it being quite old. British gas have been to have a look and have quoted for a condesing Worcester Greenstar 18Ri high effciency boiler at £3'327.75 ! this price includes the -£400.00 scrapage scheme...

ok, tell me this, Ra divide by 30mA = less than = to 50v so 80.1 / 30mA = 2.67 Volts still learning and getting my head around it all :?

sank an earth rod today to see if we can get a lower value of earth resistance, reading we had came to 80.1 ohms. Nothing is connected proper yet to this new earth as the system is still using the old earth, (in the process of upgrading) figures quoted in on-site guide say max of 200 ohms...

yes but needs tidying up slightly :D

been to a property today to do a pir, on visual inspection of the garage( the garage had a dedicated metal clad cu suppling two circuits, these were lighting and power circuits) a second cable (swa) is taken from the incoming tails of the cu to an out-house with another cu supplying two...

pump is incorporated in shower unit on wall in bathroom, 3A fcu situated in airing cupboard wired from existing ring final circuit. RCD fcu ? or if no RCD protection on CU upgrade to new RCD protected CU? just wanted opinion on RCD protection for special location, be it fcu or new CU

can someone clear this one up please. Is it within the regulations to install a power shower in a bathroom with the electrical supply coming off an existing ring main to RCD fcu, then to shower ? or would you have to install a new cu with RCD so the whole ring main that the spur to shower is...

i don't think so, have tried it and get same readings, still learning so just making sure what i'm doing is correct

if someone could just clear this up please, when doing a insulation resistance test on a ring main, be it between live conductors, or between live conductors and earth, would i be correct in saying that you put the crock clips on both live conductors of the circuit and test :?: or just one...

would someone please explain the reasons for having a 0.4 second disconnection time and a 5 second disconnection time, why is there a big difference between the two readings

-------------------------------------------------------------------------------- It rather depends why you want to know - what is the context? A so called 'clean earth' should, if anything, be called a 'cleaner earth'. That is, it is possibly slightly less affected by electrical noise...

Can someone just explain what this term generally means ?

Can someone clear this one up please, if you want to install a socket outside i understand that it has to be according to regulations be rcd protected. If the consumer unit has rcd protection for the power circuits already, do you also install a socket that has rcd protection incorporated in it...

Cable on transformer side, this is 0.75mm. 105 watts (if taking maxium transformers is rated for) will take 8.75 amps on 12v voltage, cable is rated at 6 amps in BS 7671

I would like to know if this is correct in what i am thinking, i have a Skot T105 transformer purchased from Screwfix about 5 years ago. The trany's minimum loading is 35 watts and maximum 105w (hence T105). The wiring for the transformer is pre-wired with 0.75mm primary and 0.75mm secondry. If...

Thats how i understand it but just double checking. Will clarify with tutor on this subject again, thx for replying.

Been at college today and had a discussion on SELV circuits regarding lighting, cable selection etc. Question came up about using dimmers on selv lighting with the tutor saying in his notes basically not to use them because of problems that they may cause to cable / lights. On further...