2018 Adverse Calendar


Well, that's it for Christmas! No more training days until the New Year. It's been a busy time, with the 18th Edition courses in full swing, and the Inspection and Testing courses proving to be ever popular. So, to continue the 'Adverse Calendar' of faults and non-compliance,

I have posted a few more of the photo's I have taken in the last year or so, with the Codes that were issued at the time.

Please feel free to contradict or suggest alternatives, as I have mentioned before Coding depends on the environment, user and type of installation among other things, it is not an exact science - which is why we need trained, competent, knowledgeable electricians to carry out this type of work!

WINDOW NUMBER 6

A three-phase distribution board with different makes of protective device fitted. The three-phase mcb actually prevents the 'sliders' from coming across, so the installer has cut them off! Notice anything else about the three-phase mcb? The single phase mcb appears to show signs of damage, probably due to over-tightening.

Classification codes used.

4.14 Examination of protective devices and bases, correct type and rating . C2

4.21 Confirmation that all conductor connections are correctly located in

terminals, and are tight and secure C2

Section K. Observations.

Incorrect phase rotation due to incorrect connection at mcb (4.21) C2

MCB damaged and made to fit, wrong type for board. (4.14) C2

Single phase MCB appears damaged due to over-tightening (4.21) FI / C1

WINDOW NUMBER 7.

Earthing conductor connection of a TN-S system completed by using a bonding clamp.

These are made for solid pipes, not cables.

BS 951 states that these type of clamps are not intended for connection to the armour or sheath of a cable, as when tightening the clamp, the cable is liable to be damaged by crushing the bedding or insulation. This may result in an electrical fault within the cable, with the risk of serious injury to persons.

Classification codes used.

3.1 Presence and condition of distributors earthing arrangement C2

WINDOW NUMBER 8.

Yes, well, fairly self explanatory this one. It was a rented flat, the cooker circuit was (I will not say protected) kept going by the use of a piece of copper wire, possibly 1.5mm, that had been used to replace the correct fuse wire. This had overheated over time, causing the thermal damage to the fuse base. The cooker plate also had a 13A socket on it.

Classification codes used.

4.14 Examination of protective devices and bases, correct type and rating,

(no sign of unacceptable thermal damage, arcing or overheating) C1

5.6 Coordination between the conductors and overload protective device C1

5.7 Adequacy of protective devices, type and rated current for fault protection C1

5.12 Provision of additional protection by RCD not exceeding 30mA:

for all socket-outlets of rating 20A or less (this was under 2015 Regs.) C3

for cables concealed in walls at a depth of less than 50mm. C3

WINDOW NUMBER 9.

This was a friends house, she was having some building work done (new kitchen, some walls down to make a dining area etc). The builder had completed the electrical work but had not provided an EIC . I offered to look at the wiring before the building work was complete, as she had become concerned about his competence electrically.

The photo shows how he had joined some cables, six lighting cables running to a multi-gang switch, and a radial circuit supplying a twin socket for the kettle and coffee machine. These had been tucked behind the plaster board, and the intention was to just seal them, hanging loose vertically, behind the completed plasterboard and wood stud partition.

Classification codes used.

5.1 Identification of conductors, C3

5.2 Cables correctly supported throughout their run C2

5.10 Concealed cables installed in prescribed zones C2

5.17 Termination of cables at enclosures (I know at this point there is no

enclosure, but there should have been)

Connections soundly made and under no undue strain C2

No basic insulation of a conductor visible outside the enclosure C2

Connections of live conductors adequately enclosed C2

Section K. Observations.

Joints/connections not available for inspection, testing or maintenance (5.17) C2

(Regulation 526.3)

Joint in live conductor not made within suitable enclosure (5.17) C2

(Regulation 526.5)

There is undue strain on the connections as cables are unsupported (5.2) C2

(Regulation 526.6)

Cores of cables with sheath removed not enclosed (5.17) C2

(Regulation 526.8)

Cables not run in prescribed zones, may be damaged by fixings. (5.10) C2

(Regulation 522.6.202)

Switch-lines not identified as line conductors C3

(Regulation 514.3.2)

WINDOW NUMBER 10.

Metal trunking carrying PVC insulated singles, to supply a number of sockets and isolators for some small power. Apart from the screw missing on the socket, there was a section of lid missing from the trunking. On closer inspection we found several joints in cables, including this almost taped joint of a line conductor!

Classification codes used.

5.3 Condition of insulation of live parts C1

5.4 Non-sheathed cables protected by enclosure in conduit,

ducting or trunking ( to include integrity of trunking system) C2

5.17 Termination of cables at enclosures (joint should be enclosed)

Connections soundly made and under no undue strain C2

Connections of live conductors adequately enclosed C1

That's enough for now, remember the most important thing is to highlight the dangers, and ensure that adequate remedial works are carried out. Not everything falls neatly into a 'box' or category so sometimes we have to step back a bit, consider our options for recording

issues and make a decision!


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