EICR tick sheet other methods of protection

[Nigel]

Just looked up 412.2.4.1 I couldn't see where it says the sheath is a layer of insulation. It does refer to " adequate mechanical protection of the basic insulation".

The Reg in full:

412.1.4.1 Wiring systems installed in accordance with Chapter 52 are considered to meet the requirement of Regulation 412.2 if:

(i) the rated voltage of the cable(s) is not less than the nominal voltage of the system and at least 300/500 V, and
(ii) adequate mechanical protection of the basic insulation is provided by one or more of the following:
(a) The non-metallic sheath of the cable
(b) Non-metallic trunking or ducting complying with the BS EN 50085 series of standards, or non-metallic conduit complying with the BS EN 61386 series of standards.

NOTE 1: Cable product standards do not specify impulse withstand capability. However, it is considered that the insulation of the cabling system is at least equivalent to the requirement in BS EN 61140 for reinforced insulation.

NOTE 2: A wiring system should not be identified by the symbol for Class 2 equipment or Earth Free.

 

[Andy78]

So as far as that reg goes, the sheath of the cable can be used as a reinforced barrier when creating a system that, in its entirety, can be classed as employing the protection measure of double insulation.

It does not state that type of cable on its own can be referred to or regarded as double insulated.

Am I understanding that right ? I have never employed double insulation as a protective measure for a whole system.

 

[Nigel]

So as far as that reg goes, the sheath of the cable can be used as a reinforced barrier when creating a system that, in its entirety, can be classed as employing the protection measure of double insulation.

It does not state that type of cable on its own can be referred to or regarded as double insulated.

Am I understanding that right ? I have never employed double insulation as a protective measure for a whole system.

I think I am with you. If I am then yes. A cable is deemed to be double insulated if it meets the requirement in that Reg.

However as you say you would not tick the Double Insulated box unless you were designing for this. The main head would be affording you ADS.

Reinforced Insulation is the same degree of protection as DI but only one layer of insulation.

 

[westward10]

It is very tenuous and unclear as I don't deem any part of the insulation or sheath as reinforced. The Reg considers the insulation, not the sheath as I read it is at least the equivalent to the requirements of reinforced insulation. I actually find that difficult to believe.

 

[Flanders]

In must installation and in my case all installation I have worked on used ebads and now ADS as method of protection . This tick box refers to the whole instalation so double insulation is not used as method of protection so N/A would be entered on the tick sheet . Ibe always been guided that main tails are not double insulated as others have said. the outer is clased as mechanical protection .

 

[Nigel]

It is very tenuous and unclear as I don't deem any part of the insulation or sheath as reinforced. The Reg considers the insulation, not the sheath as I read it is at least the equivalent to the requirements of reinforced insulation. I actually find that difficult to believe.

The Ref is referencing cables that are DI not RI.

 

[westward10]

The Ref is referencing cables that are DI not RI.

Note 1 references insulation and a reinforced insulation comparison.

 

[Nigel]

Note 1 references insulation and a reinforced insulation comparison.

I think that is a direction and not a statement.

For a cable to be DI the insulation must meet BS EN 61140 and have an outer sheath to be classed as DI.

 

[Craig3]

Thanks for all the responses. I've always believed the section on other methods of protection was referring to the installation as a whole and not just an individual circuit or circuits. I've read through the relevent sections in the regs book but the wording of it isn't always the easiest thing to get your head round

 

[Richard Burns]

I tend to consider that it would only be applicable for a situation where that method of protection is the sole means of providing basic and fault protection. Because ADS is so prevalent this is likely to be in place and so the other method will not be the sole means and so ADS will apply.

 

[Deleted member 26818]

As far as I am aware, this tick box has only been for EICs since the 17th 1st amendment?
It has been slightly altered for the 18th, in an attempt to clarify this particular issue.

Anyway, to answer the OP, yes other methods of protection should be ticked, if they are in use.

Meter tails have reinforced insulation, which satisfies the requirements for double insulation.
T&E does not, as the live conductors only have a single layer of insulation between them and the CPC.

 

[westward10]

I think that is a direction and not a statement.

For a cable to be DI the insulation must meet BS EN 61140 and have an outer sheath to be classed as DI.

As I said tenuous and something I do not buy.