bathrooms and fixed appliances

[murdock]

what are the regulations with regards to a mirror with lights in a bathroom in lets say zone 2...100 mm away fron the shower without a door.

if you have an extractor fan directly above your shower which regulations would you take note of...if the extractor is connected to the light fitting and is above 2.5 metres from ther shower basin...what is the zone just above the shower and what if it is extracting the steam?

[murdock]

even better still...what about a fixed appliance mounted at 2.6 m above the shower basin if the shower rose is 2.1 metres above the shower basin? which regulation to use?

[bergie]

if you have an extractor fan directly above your shower which regulations would you take note of...if the extractor is connected to the light fitting and is above 2.5 metres from ther shower basin...what is the zone just above the shower and what if it is extracting the steam?

i wouldnt worry about the fan as the motor is in the ceiling area and the housing is plastic.if its extracting steam ,its not going to extend the zone,as its not as if the steam is flammable. if its connected to the light then the light switch should be double pole.

[murdock]

i wouldnt worry about the fan as the motor is in the ceiling area and the housing is plastic.if its extracting steam ,its not going to extend the zone,as its not as if the steam is flammable. if its connected to the light then the light switch should be double pole.

or on earth leakage

[TECHNICIAN 810]

All bathroom appliances including mirror lights should be on earth leakage.
It's allso regulation to have ceiling fans on earth leakage.

[murdock]

All bathroom appliances including mirror lights should be on earth leakage.
It's allso regulation to have ceiling fans on earth leakage.

in which zone?

[Sparks]

Table 7.1 ― Conditions under which electrical equipment
may be installed in a bathroom
1 2 3 4
Conditions that apply in
Electrical equipment Zone 1 Zone 2 Zone 3
Distribution and control X X Normal provisions of this
part of SANS 10142
Bell push B1 and C1 B1 and C1 Normal provisions of this
part of SANS 10142
Socket-outlet X C2 Normal provisions of this
part of SANS 10142
Wall switch X X Normal provisions of this
part of SANS 10142
Pull switch Normal provisions of this part of SANS 10142
Distribution boards X X X
Fixed appliances
(including luminaires)
(A and B1)
or
(B2)
(A and B1)
or
(B2)
Normal provisions of this
part of SANS 10142
The symbols used in this table are the following:
A denotes that earth leakage protection shall be provided;
B1 denotes that the equipment shall be so enclosed in insulating material that it is not
possible to touch current-carrying parts with the standard test finger;
B2 denotes that class II appliances shall be used;
C1 denotes that the equipment shall be supplied from a safety supply with a secondary
voltage not exceeding 25 V;
C2 denotes that the equipment shall be supplied from a safety supply that has a
maximum rating of 50 VA. Shaver supply units shall comply with SANS 61558-2-5/
IEC 61558-2-5 (SABS IEC 61558-2-5).
X denotes that the equipment shall not be installed.
Amdt 1

7.1.4.3.1 In zones 0, 1 and 2, no switchgear and accessories shall be
installed except that emergency push buttons, which operate at a safety
extra low voltage at nominal voltage not exceeding 12 V, are permitted in
zones 1 and 2.

Zone 1 is limited by
a) the vertical plane circumscribing the outer edge or 0,20 m from the
inner edge (where the ledge is too wide) of the bathtub, shower basin,
or for a shower without a basin, by the vertical plane 0,60 m from the
shower rose,

[Sparks]

In other words, neither the fan nor the lights are acceptable.
Maybe Dave can get the table to display correctly.
Pasting is a whole lot faster than I can type.

[murdock]

zone 1-2 only extend to 2.5 m which means at 2.6 m it is out of the zone 1 and 2...zone 3 rules apply.

[Sparks]

Almost but not quite, it extends to "at least 2500mm" and then must be read with "600mm above the shower rose".

[murdock]

Almost but not quite, it extends to "at least 2500mm" and then must be read with "600mm above the shower rose".

where did you find that?

because we were discussing this issue last week...something else came up...what if the shower rose is 2600mm...just to put a spanner in the works...and yes anything is possible.

[Sparks]

7.1.2.2 Zone 1
Zone 1 is limited by
a) the vertical plane circumscribing the outer edge or 0,20 m from the
inner edge (where the ledge is too wide) of the bathtub, shower basin,
or for a shower without a basin, by the vertical plane 0,60 m from the
shower rose, and
b) the horizontal plane 2,5 m above the bathtub or shower floor.
And then Figure 7.1.3

If the rose is 2.6m afl your zone is extended to 3.2m

Keeping in mind that we are in the new SA
I have come across plenty who did not consider the "600mm above the rose".

[murdock]

thanks for for that info.