everynights a 17th edition night

[i=p/u]

ask me questions, see if i can find in appropiate time, no trick ones please only if you have nothing better to do..

 

[topquark]

Recommended height of a firefighters switch please?

 

[i=p/u]

not more than 2.75m from the ground reg 537.6.3, i find it easier by going to index at back, whats your thoughts

 

[clicon357]

Minimum CSA for earth conductor on a TT supply............

 

[topquark]

not more than 2.75m from the ground reg 537.6.3, i find it easier by going to index at back, whats your thoughts

Good. Sometimes, but often you won't find it in the index so you'll need to know which sections are applicable

 

[clicon357]

Good. Sometimes, but often you won't find it in the index so you'll need to know which sections are applicable

I found when taking my 17th and indeed doing the revision questions leading up to it that you could generally pick a key word in the question that you then find in the index...........

 

[i=p/u]

i know in my head it is 6mm but cant find it in regs.. im @ 542.1.6

Minimum CSA for earth conductor on a TT supply............

 

[i=p/u]

feel as if years away of knowing the sections.... index slightly easier, but are they all there... 17th exam in 2 weeks

I found when taking my 17th and indeed doing the revision questions leading up to it that you could generally pick a key word in the question that you then find in the index...........

 

[clicon357]

i know in my head it is 6mm but cant find it in regs.. im @ 542.1.6

Table 54.1...........

 

[topquark]

What is a reduced low voltage system?

 

[clicon357]

feel as if years away of knowing the sections.... index slightly easier, but are they all there... 17th exam in 2 weeks

PM me if u want a bunch of test questions..............all PDFs

 

[i=p/u]

2.5mm protected against mechanical damage , 16mm if not, isit thumbs up???

Table 54.1...........

 

[topquark]

What is the maximum Zs for a circuit protected by a 30A BS3036 Fuse?

 

[i=p/u]

part 2 line to line doesnt exceed 110v and line to earth doesnt exceed 63.5 on 3phase

 

[i=p/u]

1.09 ohms tabe 41.2 and which i would multiply by 0.8 to get my max value in the real world

What is the maximum Zs for a circuit protected by a 30A BS3036 Fuse?

 

[i=p/u]

cheers will do

PM me if u want a bunch of test questions..............all PDFs

 

[i=p/u]

as it is guys ive only started looking at the regs so im pushing myself to pass but learn the destinations of the book..

 

[clicon357]

2.5mm protected against mechanical damage , 16mm if not, isit thumbs up???

It was 2.5mm sq I was looking for......protected against mechanical damage and sheathed

 

[topquark]

What is the required minimum impulse withstand voltage for a 230V installation of category II equipment?

 

[i=p/u]

so does that mean if is 2.5mm it has to be in conduit or trunking ..

It was 2.5mm sq I was looking for......protected against mechanical damage and sheathed

 

[topquark]

Name three electrical sources for safety services?

 

[i=p/u]

2.5kv ......

What is the required minimum impulse withstand voltage for a 230V installation of category II equipment?

 

[clicon357]

so does that mean if is 2.5mm it has to be in conduit or trunking ..

Guess so, that's how I read it, but TBH I would think its a bit impractical in real terms. You would have to run your trunking out into the flower bed etc right up to the earth electrode. Easier to use a length of sheathed 16mm sq (if buried or not) and be done with it.

 

[i=p/u]

isit chapter 56 560.6.9 .10 .11 .12???? page153

Name three electrical sources for safety services?

 

[clicon357]

2.5kv ......

kV not kv............

 

[i=p/u]

im under pressure

 

[topquark]

isit chapter 56 560.6.9 .10 .11 .12???? page153

560.6.1

 

[topquark]

Is it acceptable to use a TNC-S (PME) type earthing system on a caravan site for a permanent building?

Is it acceptable to use a TNC-S (PME) type earthing system for earthing a static caravan (the chassis would need to be earthed for this)?

 

[i=p/u]

now your getting personal topquark,, it sounds like you asking for a list, and he tells us c&g love lists....

 

[topquark]

now your getting personal topquark,, it sounds like you asking for a list, and he tells us c&g love lists....

Yep three examples of what could be used as a source for safety services (they are listed in that reg).

 

[i=p/u]

id say no to both 7.21.411.4... somehting tells me bond the chasis

Is it acceptable to use a TNC-S (PME) type earthing system on a caravan site for a permanent building?

Is it acceptable to use a TNC-S (PME) type earthing system for earthing a static caravan (the chassis would need to be earthed for this)?

 

[topquark]

id say no to both 7.21.411.4... somehting tells me bond the chasis

Yes to the first, no to the second.

 

[i=p/u]

do you think by myself putting on first message 'only if you have nothing better to do has put them off your a man topquark

 

[i=p/u]

should i be looking at permanent building , do they see caravan as tow away normally but as you have said permanent

 

[Sparky Ninja]

who declares the date for the first inspection and test of an installation following initial verification?

 

[topquark]

Have a read of section 708 in the new edition. Generally it is thought that PME is not allowed on a caravan site. There is however an exception that allows it to be used for permanent buildings IE offices etc. But it should NEVER be used for feeding either static homes or mobile caravans.

 

[Sparky Ninja]

What is the maximum Zs for a circuit protected by a 30A BS3036 Fuse?

1.09 ohms tabe 41.2 and which i would multiply by 0.8 to get my max value in the real world

What if it is measured at 20 degrees C?

 

[i=p/u]

i can read the question you asked now...

Have a read of section 708 in the new edition. Generally it is thought that PME is not allowed on a caravan site. There is however an exception that allows it to be used for permanent buildings IE offices etc. But it should NEVER be used for feeding either static homes or mobile caravans.

 

[Deleted member 26818]

With the earthing conductor, Table 54.1 only applies to conductors that are buried.
There is no requirement to provide sheathing or even insulation for an earth conductor.
With the Caravan, it all depends on how you define static.
Residential caravans that are not intended to be moved, are regarded as being permanent buildings.
As such they can be connected to a PME system.

 

[Burnt Fingers]

Can you define High Voltage according to the BS (shortened for laughter value)