[Question] Completion of CoC

[Pieter Visser]

Hi guys, some questions in completing a CoC:
1)Lighting points that are fed via an extension cord plugged into a socket (earth leakage protected) - do that count as lighting points?
2)Disconnector required if an extraction fan is connected via a lighting point that is earth leakage protected?
3) Disconnector required if a gate motor is fed via plug socket in a garage?-There is a clear view to the gate.(19m)
4) A chandelier with a number of lamps, does that count as one lighting point?
Many thanks.
Pieter.

[GCE]

Have pasted what I see as the relevant regulations below


1)Lighting points that are fed via an extension cord plugged into a socket (earth leakage protected) - do that count as lighting points? Depends on the distance involved and taking into consideration 6.16.1.5 and 6.16.1.10

2)Disconnector required if an extraction fan is connected via a lighting point that is earth leakage protected? 6.16.4.3 bears relevance

3) Disconnector required if a gate motor is fed via plug socket in a garage?-There is a clear view to the gate.(19m) 6.16.5 and 6.16.1.5 along with 6.16.1.10 are all relevant
)4) A chandelier with a number of lamps, does that count as one lighting point?
I would say yes as long as it is a bought store fitting and not something made up out of a number of single hanging fittings.


6.16.1.4 The disconnecting device shall be positioned
a) within 1,5 m from the appliance, or
b) in a distribution board (if the switch-disconnector is capable of being locked
in the open position).
Even where a disconnecting device is on the appliance, a separate
disconnecting device shall be provided in the fixed installation to allow for the
total removal of the appliance.
NOTE A standard switch is not a switch-disconnector.
6.16.1.5 A socket-outlet shall supply only one fixed appliance. The use of
flexible cords of length exceeding 3 m is not recommended. The reason for
this recommendation is an endeavour to ensure operation of the overcurrent
protective device. (But see also 6.14.1.4 for luminaires.)

6.16.1.10 The wiring between different parts of a fixed appliance that are
installed separately is part of the fixed installation, even where it is supplied
from a socket-outlet, unless such wiring is less than 3 m in length.
Such wiring shall be protected by separate overload protection unless its
current-carrying capacity is such that the circuit protection of the socket-outlet
circuit will provide protection or that part of the appliance has built-in thermal
overload protection.
NOTE Where the length of wiring exceeds 3 m, the impedance and the functioning of
the protective devices need to be considered to satisfy the overcurrent protection
requirements in this part of SANS 10142.

6.16.4.3 Extraction fans
Where an extraction fan supply is switched with a luminaire, it shall be
connected to the switched portion of the light circuit, provided that the fan
circuit is connected by means of a SANS 164-3 or SANS 164-2-1 or
SANS 164-2-2 socket-outlet or a switch disconnector.


6.16.5 Motors
NOTE Motors include the motors in automatic doors and gates, garbage disposal
units, pumps (pool, fountain, spa, etc.), and the like (see also 6.16.1).

6.16.5.1.4 Each motor shall be supplied by a manually operated disconnector
or any other manually operated disconnecting arrangement such as a
withdrawable circuit-breaker, a removable link, a fuse or by the removal of a
plug from a socket-outlet, which provides at least the same isolating distance,
for the sake of safety, as a disconnector that is
a) readily accessible and mounted on or next to the motor, or
b) visible from the motor, or
c) lockable in the open position, or
d) housed in a lockable enclosure other than a distribution board.

[ians]

A question with regards to a stationery machine in a factory which has a door mounted isolator.

Is a separate disconnecting device (isolator) required ... mounted on the wall?

[GCE]

A question with regards to a stationery machine in a factory which has a door mounted isolator.

Is a separate disconnecting device (isolator) required ... mounted on the wall?

Yes it is according to the regulations - I understand the need on smaller machines and would like to see the regulation changed to apply up to say 60Amp fixed appliance/machine installations.
It makes it difficult when you start supplying power to a 300Amp machine and the requirement for a separate isolator.
Supposed the locked in the open position would overcome that requirement


6.16.1.4 The disconnecting device shall be positioned
a) within 1,5 m from the appliance, or
b) in a distribution board (if the switch-disconnector is capable of being locked
in the open position).
Even where a disconnecting device is on the appliance, a separate
disconnecting device shall be provided in the fixed installation to allow for the
total removal of the appliance.
NOTE A standard switch is not a switch-disconnector.

[ians]

Something to take into consideration:

A circuit breaker has the same disconnecting charateristics as a isolator and can be locked in the open position at the DB ... but consideration for single phase circuits ... due to only the phase being disconnected and not both live and neutral.

Yes I do own all the various lock devices for both samite and din mounted circuit breakers ... however it may not apply to all electricians.