Inspection and testing theory question.

[James bishop]

Hi, Im studying Level 3 and come up against a question which said,
'What is the ip rating for a front cover?'
'What is the ip rating for the top?'
I am not sure what it's asking for even though i did pass the exam they don't give you the papers back. For the top i put 2x and for the cover i put 4x is this correct i was not so sure on what they're asking for. can you state which is the correct one.

Also I would like to know what to look for in a plastic conduit 20mm put on a external wall, it asked for the Senses used and what your looking for. Example: Sense, Look for: wear and tear. what else would you look for?

 

[telectrix]

most enclosures stipulate IP4X top. IP2x sides and bottom. cover ( IMO) should be IP4X.

 

[Andy78]

416.2 IP4X for the top surface, IP2X for other sides. These are a minimum requirement though.

GN3 has a very comprehensive list of items to be inspected with regard to conduit systems.

 

[westward10]

Externally fixed pvc conduits are prone to expansion in hot weather, we have all seen conduits snaking across walls. There is a connection which can be used to prevent this, all you need to do is find out what it is.

 

[Jamie']

IPXXB If a standard test finger 80mm long and 12mm in diameter can enter the enclosure there will be adequate clearance from live parts

IPXXD If a probe 100mm long and 1mm in diameter can enter the enclosure there will be adequate clearance from live parts

More info can be found here:

IP Codes Explained - electriciancentre.co.uk - http://electriciancentre.co.uk/how-to/ip-codes-explained/

 

[electric al]

Conduit - is securely fixed ( touch )
Not damaged so as to have a detrimental effect on installation. (Sight )
Junction box lids are secure and not missing ( touch and sight )
Conduit is of British or eu standard