Have seen several threads on here regarding battles with gas engineers and sparks re the above.The regs state the the earth clamp shall be fitted within 600mm where "practicable",but then goes on to state before any branches in the pipework.Should the word practicable also apply to any branches...
For some reason
For some reason rcd fused spurs are no recognised by the regs for additional protection,so maybe a dp rcd in an enclosure at the cu would be a solution.
Regards,S
In the past have seen a resistor,(100k or 100? ohm)connected between one phase and N on a 4 pole rcd so that the test button will work as normal and the unit will operate on 1,2 or 3 phases.
Regards,S
Recently had a job where I applied bonding to a metal pipe at the stop tap before the plumber had
plumbed in the boiler and kitchen.Came back weeks later and metal stop tap was under the floor with new plastic pipe joined on and new stoptap.Should main bonding be disconnected from the old...
Not an expert on em lighting,but could a contactor on each lighting cct with series contacts break the cct to the em lights if any lighting cct failed?
Assuming your supplying 2 phase and neutral supply you could use a 2 pole or 3 pole mcb mcb with L3 spare,subject to the armour being suitable for the earthing system.You would never switch 2 phases with a single pole device.
Have been asked by a customer to fit prepayment meters in a house divided into flats.
Not seen the job yet,but told each flat has a cu.Have been in contact with S P Wales,
who can supply digital meters,and prepayment cards,which the landlord sells to the
tenants.In the past have only fitted...
The installation is in a s/s food servery unit and is only about 3m long,so no long circuits and no loads to affect the
rcbos.Gone online and hager do,nt appear to make a rcbo above 30ma,or an s type rcbo.Will check again on Monday
and report back.The meter is a robin KMP 5404.Have just tested a...
Sorry thought they were tested at 350ma?
Tested 9 brand new Hager rcbos (type A) today and they only tripped when the Robin was set to 300ma.So they must be old stock?
S
Just wondered how we would know a 30ma type A rcd/rcbo will trip at 30ma,if we
can only test it at 350ma?Think I must be missing something.Thanks for any help.
Regards,S
I used to make up type A boards using Hager enclosures and devices but Hager will give no warranty on home made boards even with their own parts,so w,ere stuck with Proteus..
S
More customers have heard of nic than napit,and you can transfer to ac later if you expand,but for domestic work they do the same thing for registering notifiable jobs.
S
A workmate in Yorkshire built a small 500w system comprising a panel,invertor/charger and some 2nd hand fork lift batteries.
.It works in summer to supply a freezer and lights etc at night,but in winter the output is so low,he has to charge
the batteries from the mains just to keep them...
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