The rope DB thing: We used to install the SS chain in DB's where lowering the DB is just not possible. What is safer, doing joints on the cables because they are too short or fitting the chain? As far as cost go its also just too expensive fitting seperate ciruits like a mains outside the DB (since most db's are flush mounted). I started my electrical career at an explosives and chemical manufacturing facility, where I learned the SS rope thing. Think of any electrical standard......they doubled it. If 1 Mohms is good enough for SANS, they said 10Mohms etc.
The DB in a Cupboard: The unfortunate part of the DB in cupboard as wrong as it may be, no-one will give you permission to dismantle their cupboard. The argument that I've heard more than once when telling people its not really ideal/right, is, we bought the house like this, the house was built like this.
Bonding an antenna: As the word may could possible exclude SPD's from an installtion, Page 186, 6.13.2.3 says "An antenna (including a satellite dish) shall be bonded to the installation earthing system by means of a conductor of at least 2.5mm2 copper or equivalent". This piece says SHALL.
The Space heater: The argument went around Page 199. Note 2 talks about the appliances for space heating, and 6.16.4.1.2 talks about space heater. We eventually agreed that a "Space Heater" regardless of the interpretation is actually an infra red or element heater that normally fits on a wall (thats where the out of arms reach bit comes in). And a heater that heats a space i.e. its generally doing space heating. Hope this makes sense......I don have a better way to discribe it? Why is this important you ask..... A space heater shall have its isolation in the same room/or on the appliance. If underfloor heating fell under the same category, it would have meant that installing a double pole CB in the db which is lockable and marked and under the safe principles of a fixed appliances would not have been allowed . Since I was working in the underfloor heating industry, it affected my customers that could not get a COC because there was no Isolator in the same room. Installing a 2xCB in the DB was ideal....
Fitting an E/L: If SANS relaxed a bit as far as old (1992) and new installations go we would get more done. Installing a new EL means a change to the electrical system, which in turn means the system has to comply to SANS 10142. Replacing items as I see it is not a change in the system. If SANS said.....you can install a E/L, it does not mean that the system is all of a sudden post 1992, more people would do it as its not going to cost an arm and a leg. I too inform people, but they argue that if it was only installing a new EL they would do it, because its ten other things as well once the new EL is in, no way.....?
Thats enough for one day.....
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