Ok, so you have air conditioning installers and repairers who are doing electrical work.
This is not installations work under BS7671 with regard to the fixed wiring installation in the building?
Or is it, would your air conditioning guys make changes to a unit, that would have an impact on the incoming supply?
Would they put in a larger unit, then just swap out the upstream fuses or breaker?
Why do I ask this, because I’ve been behind air-con guys who have done just this, and then ended up overloading the supply circuit, so, whilst their employer claimed they were competent, they weren’t.
If they are not working on the fixed wiring covered by BS7671, then you are saying that they are working on the control systems and wiring within the air-con units themselves.
This is still covered by EAWR.
Thus to do the work they must still be competent.
Now, there are definitions of competent, so I’m not going to repeat them, however, training does form part of competence.
In the event of an issue you would need to be able to prove competence would you not?
So, could you prove that your air-con guys are competent to work on the electrical systems?
Next, a comment on said electrical systems.
BS7671 (the UK implementation of EN 60364) applies to the fixed installation.
Now, it does not apply to machinery, by its own definitions BS7671 does not cover any machinery electrical systems that are part of machinery covered by the Machinery Directive.
These systems are covered by EN 60204-1 (BS EN in the UK).
Now, there are differences between the two standards EN 60204 & EN 60364 that are not taught on general electrical courses in most training establishments because they teach around BS7671, and there is nothing wrong with that.
So, now you have a quandary, you really need to be able to prove your air-con guys are competent to undertake minor repairs, such as replacement of components, like for like, and undertake fault finding safely under EAWR, and BS7671 & EN 60204.
Why both standards, well, the equipment will almost certainly come under the machinery directive, if not then the LVD, and again EN 60204 is a Harmonised standard under both the MD & the LVD.
Air-con units for household and similar also have their own C-type standard EN 60335-2-40 which is harmonised under the machinery directive, thus one must look also back to the A & B-type MD standards.
Now I’m not suggesting that your air-con installers & repairers must have intimate knowledge of these standards, however, the equipment will be CE marked thus, you have a duty to ensure that the equipment remains safe as the OEM designed it.
Thus, repairs must be undertaken with at least one eye on the design standards.
Otherwise you will be modifying the equipment and becoming the manufacturer, with all of the responsibilities & liabilities thereof.
Also, air-con units are often distributed around the building, thus the interconnecting wiring will then be covered by BS7671, thus your air-con installers whilst not providing supplies must be competent to install and connect the wiring systems between the discrete sub-assemblies in accordance with BS7671, or example fire-resistant cable supports in escape routes, etc.
Now how would they know that there is now a requirement in BS7671, that applies to any wiring that they install between discrete units which now requires fire-resistant fixings when this wiring is within an escape route in a building.
By the way, BS7671 applies to almost everything both fire alarm & security installers and repairers do, like it or not, it is only subservient to BS 5839, so how can you say that your fire-alarm installers don’t need electrical training?
As far as EN 50131 goes, as far as installation, it bows out to local and national electrical safety standards, so we are back to BS7671 & EN 60364.
They must be competent to undertake their works, thus, they must be competent and have a working knowledge of BS 5839 & BS 7671 for alarms
After all fire alarm works is, electrical work, the same as security systems works.
Remember, all of this is covered by EAWR, and the other relevant regulations which are statute law.
Oh, and one last thing, a single qualification in BS7671 such as the C&G 2382 (17th Ed.) does not make a person a qualified and competent electrician, this course is designed to take a competent practicing electrician, and make them familiar with the layout of, and any updates to BS7671, that is primarily, the book. It does not teach any, practical skills, it teaches you how to find your way around the BS7671, “the book”, it will make the person more familiar with the requirements for electrical installations, by virtue of them reading the regulations in finding their way around, the book, but it does not make a competent electrician.
In summary then, your fire alarm installers and repairers must be qualified in BS7671 as they must have a good working knowledge of it’s requirements because it applies to almost all of the work they do.
It also by the way applies to “Sky” installers, telecoms installers, security installers, network & data guys also.
In the same way that EAWR applies to everything electrical in the work place, BS7671 applies to everything with regard to the wiring within building infrastructures, (excluding HV, i.e. >1kV), it applies to control systems for BMS, the BMS systems themselves, telecoms wiring, data wiring, electrical power wiring, obviously, interconnections between systems such as discrete air-con units etc. etc. etc.
So, no one should be undertaking modifications to these wiring systems unless they are competent to do so, therefore they must have a good working knowledge of the design & installation requirements for the work that they are doing.
As far as low voltage power goes i.e. 230V circuits, how can your people prove that these circuits are safe and compliant with EAWR, to re-energise after work if they do not have a sufficient understanding or competence to check this safety, in general the safety tests are in EN 60364, EN 60204 & BS7671.