Transcript SECTION 701 LOCATIONS CONTAINING A BATH OR

PART SEVEN
SPECIAL INSTALLATIONS OR
LOCATIONS
CHANGE
Additions and reorganisation
• […] high protective conductor currents now section 543
• Highway power supplies […] now section 559
Part 7
Special Installations and Locations
Major changes:• Greatly expanded
• Bathrooms :- No zone 3, RCD’s required to all circuits
• Swimming pools:- Zones now numbered, fountains inc.
• Construction/Agriculture:- no 0.2 sec. disconnection
• Caravan parks:- changes
Section 700
Section 701
Section 702
Section 703
Section 704
Section 705
Section 706
Section 708
Section 709
Section 710
GENERAL
LOCATIONS CONTAINING A BATH OR
SHOWER
SWIMMING POOLS & OTHER BASINS
ROOMS & CABINS CONTAINING HOT AIR
SAUNAS
CONSTRUCTION & DEMOLITION SITE
INSTALLATIONS
AGRICULTURAL AND HORTICULTURAL
PREMISES
CONDUCTING LOCATIONS WITH
RESTRICTIVE MOVEMENT
CARAVAN / CAMPING PARKS & SIMILAR
MARINAS & SIMILAR LOCATIONS
MEDICAL LOCATIONS (RESERVED)
Section 711
Section 712
Section 717
Section 721
Section 740
EXHIBITIONS, SHOWS & STANDS
SOLAR PHOTOVOLTAIC (PV) SUPPLIES
MOBILE OR TRANSPORTABLE UNITS
[…] CARAVANS & MOTOR CARAVANS
TEMPORARY […] FAIRGROUNDS […]
Section 753
FLOOR & CEILING HEATING SYSTEMS
Questions asked on special locations - go straight
to that section and scan
Section 701 Locations containing
a bath or a shower
Section 711 Exhibitions, shows
& stands
Section 702 Swimming pools &
other basins
Section 712 P.V. power supply
systems
Section 703 Rooms & cabins
containing sauna heaters
Section 717 Mobile or
transportable units
Section 704 Construction &
demolition sites
Section 721 […] caravans &
motor caravans
Section 705 Agricultural &
horticultural premises
Section 740 Temporary […]
fairgrounds […] circuses
Section 706 Conducting locations
with restricted movement
Section 753 Floor & heating
systems
Section 708 […] installations in
caravan/camping parks […]
Section 709 Marinas & similar
locations
SECTION 701
LOCATIONS CONTAINING A
BATH OR SHOWER
ZONE 0
Interior of bath/shower (if no basin 0.10m high)
ZONE 1
2.25m or height of water outlet
ZONE 2
0.6m external to zone 1
ZONE 3
REMOVED
701.32.2 to 701.32.4
• Space under basin :- ZONE 1, If only accessible by tool OUT
OF ZONES 701.32.3
• For showers with no basin there is no zone 2, but an
extended zone 1 up to a horizontal measurement of 1.2m
FOR DETAIL SEE DIAGRAMS IN BS7671 Page 168-169
EXTRACTS
Additional protection by RCD’s 701.411.3.3
• Provided for all circuits of the location
Electrical separation 701.413
• For 1 item of equipment or 1 single socket
SELV PELV 701.414.4.5
• To have basic insulation
Additional protection 701.412.2
Supplementary bonding required, can be in proximity. Can be
omitted if RCD’s & protective equipotential bonding in situ
External influences 701.512.2
Activity What are the MINIMUM IP codes for
Zone 0
IPX7
Zone 1&2
IPX4
Where water jets IPX5
Switchgear 701.512.3.
ZONE 0
No switchgear permitted
ZONE 1
SELV switching only ≤ 12V a.c. (source outside
zones)
ZONE 2
SELV switching & socket-outlets as above and
shaver outlets to BSEN 61558-2-5
Socket-outlets prohibited within 3m of zone 1
Current using equipment 701.55
ZONE 0
ZONE 1
Fixed, permanent connection, SELV & to relevant
standard
Allowed:-Whirlpool units, Showers, Pumps,
SELV, Fans, Towel rails, Water heaters,
Luminaires
If under floor heating is employed it must have an
earthed metallic grid or sheath unless SELV
701.753
SECTION 702
SWIMMING POOLS & OTHER BASINS
Applies to fountains, paddling pools
Zones changed from alphabetical to numeral
Zone 0
The interior of the basin
Zone 1
2m from the rim of the basin and a height of 2.5m
Zone 2
1.5m external to zone 1
No zone 2 for fountains
702.32
Zones and external influences
1.5m
1.5m
ZONE 1
ZONE 1
ZONE 2
IPX4
IPX4 (IPX5)
(IPX5
OUTDOOR)
2.5M
2.5m
(IPX2
INDOOR)
1.5m
WATER JET
CLEANING
2.0m
VOLUME
A
ZONE 0
IPX8
IPX8
ZONE 2
Swimming Pools
• ZONE 0,1,2:- Every exposed & extraneous conductive part
connected
by
supplementary
protective
bonding
702.411.3.3
• ZONE 0 1:- No switchgear allowed (exemptions apply to
zone 1 702.55.4) , no socket-outlets (exemptions apply)
702.53 Only necessary wiring 702.522.22. No joint boxes
unless SELV 702.522.24
• ZONE 2:- Socket-outlet permitted if
• SELV or
• Automatic disconnection of supply with RCD or
• Electrical separation
• Underwater luminaires to relevant standards 702.55.2
SECTION 703
ROOMS & CABINS CONTAINING
SAUNA HEATERS
ZONE 1
Only the heater and directly
associated equipment to be installed.
3
1
ZONE 2
No special requirements for heat
resistance.
0.5m
1m
2
ZONE 3
Equipment suitable for 125°C
0.5m
Cables 170°C
1
0.5m
All switchgear other than the
thermostat and the thermal cut-out to
be installed outside the sauna
SECTION 704
CONSTRUCTION & DEMOLITION SITE INSTALLATIONS
Applies to:New Building Construction, Repairs Alterations
Extensions, Engineering Construction, Earth
Works, Similar Works 704.1.1
• NO 0.2 DISCONNECTION TIMES
Socket-outlets & hand held equipment up to 32A protected by
• reduced low voltage (110V) or
• automatic disconnection of supply with a 30mA RCD or
• electrical separation or
• SELV, PELV
704.410.3.10
• Over 32A – 500mA RCD
• TN-C-S not to be used (unless fixed building) 704.411.3.1
• Cables not run across roadways unless adequately
protected 704.522.8.10
• Reduced low voltage cables 300/500V thermoplastic.
• Higher voltage cables HO7 RN-F abrasion & water resistant
450/750V 704.522.8.11
Site Incoming Unit
Mains Distribution Unit
Transformer Units
Outlet Units
Extension Outlet Units
• Distribution equipment to BSEN 60439-4
• Plugs/sockets ≥16A to BSEN 60309-2 704.511.1
• To incorporate suitable devices for switching & isolation
(lockable) 704.537.2.2
SECTION 705
Agricultural & Horticultural Premises
• NO 0.2 DISCONNECTION TIME
Automatic Disconnection of supply 705.411
• Circuits with socket-outlets ≤ 32A - 30mA RCD
• Circuits with socket-outlets > 32A - 100mA RCD
• All other circuits
- 300mA RCD
Additional protection 705.415.2.1
Locations with livestock to contain supplementary bonding
to inc. the metal floor grid
Where no metal grid
installed – TN-C-S not
recommended
Protection against thermal effects 705.42
• Heaters - fixed and away from combustible material &
livestock 0.5m or manufacturers instruction. Visual on-off
position 705.33
• For fire protection 300mA RCD, S type on circuits not
containing socket-outlets
External influences 705.512.2
• Equipment to have Min. IP44
Accessibility 705.513
• Equipment inaccessible to livestock
Identification 705.514
Documentation to include
• Equipment location plan
• Distribution flow diagram
• Routing of concealed cables • Equipotential bonding
Wiring systems 705.52
• Inaccessible to livestock or suitably protected
• Where vehicles operate
• buried 0.6m with mechanical protection
• cultivated land - 1m
• suspended cables 6m high
Conduit/trunking systems 705.522.16
where livestock kept external influences – AF4
• conduit (corrosion) :- class 2 – indoor, class 4 – outdoor
where vehicles operating external influences – AG3
• conduit (impact) :- 5J
Isolation 705.537.2
• equipment installed where it will not be impeded by
livestock, clearly marked, break all live conductors
Protective bonding conductors 705.544
• shall be protected against mechanical damage, corrosion, &
electrolytic effects
Socket-outlets and luminaires to comply with appropriate
standards, IP codes, and limiting temperature 705.55
Safety services 705.56
Where high density livestock rearing exists, food, water,
temperature & ventilation:- suitably designed, installed and
monitored with standby supplies if required.
SECTION 706
Conducting locations with restricted movement
(name change)
Appropriate measures for protection
• Automatic disconnection of supply – supplementary
bonding
• SELV, PELV
• Class II equipment with additional 30mA RCD
• Electrical separation – one item of equipment
SECTION 708
Electrical installations in caravan/camping parks
Only TN-S systems to be used for supplies
TN-C-S may be used for fixed site buildings,
for supplies other earthing arrangements to
be considered i.e. T-T 708.411.4
Plugs & socket-outlets 708.553.1
No more than 4 sockets at any one point,1 per pitch
Equipment to AD4, AE2, AG3
BSEN 60309-2
Underground cables
0.6m
IP44
Overhead 3.5 or 6m
16A min.
Individual RCD
protection &
overcurrent
protection
0.5-1.5m
20m max.
SECTION 709
Marinas & similar locations
Only TN-S systems to be used for supplies
TN-C-S may be used for fixed site buildings,
for supplies other earthing arrangements to
be considered i.e. T-T 709.411.4
External influences 709.512
Water:- splashes AD4, IPX4
jets AD5, IPX5
waves AD6, IPX6
AE2, IP3X. AF2. AG2
Plugs & socket-outlets 709.553.1
No more than 4 sockets at any one point,1 per craft
BSEN 60309-2
up to 63A
Individual RCD
protection
709.531.2
Generally 16A
IP44*
0.3 - 1m
Close to craft
Connection notice to be supplied 709.3 page 196
SECTION 711
Exhibitions, shows & stands
• Only TN-S systems to be used for
supplies 711.411.4
• Accessible metallic parts to have
protective equipotential bonding
711.411.3.1.2
• All circuits, except emergency lighting, on 30mA RCD
711.411.3.3
• Equipment that generates heat to be suitably guarded,
installed, as not to cause danger 711.422.4.2
• Switchgear in locked cabinet 711.51
Wiring systems 711.52
• Cables to be mechanically protected i.e. armoured, conduit
• Min. c.s.a. 1.5mm2
• Flexes not in accessible areas unless protected
• If no fire alarm system installed in the building that is
housing the show – flame retardant cable to be used
Joints to be avoided where possible 711.526.1
Every separate structure to have isolation 711.537.2.3
Adequate number of socket-outlets for safety reasons
711.55.7
Insulation piercing lampholders for festoon lighting to be
compatible with cable and non-removable 711.559.4.3
Luminaires below 2.5m to be firmly fixed
SECTION 712
Solar photovoltaic (PV) power supply systems
PV equipment on the d.c. side considered to be energised at
all times 712.410.3
Protection by class II preferred for d.c. side 712.412
PV cables protected against short-circuit currents by
appropriate device 712.434
Wiring loops short (lightning strikes) 712.444.4.4
Equipment & wiring systems selected for external influences
712.522.8.3
Switch disconnectors to be supplied for d.c. side
Suitable warning notices fitted 712.537.2.2
SECTION 717
Mobile or transportable units
Applies to mobile vehicles & transportable containers/cabins
NOT generating sets, caravans, vehicle electrics 717.1
Automatic disconnection of supply by RCD 717.411.1
Accessible conductive parts to be connected through main
protective bonding (fine stranded H05V-K0 712.411.3.1.2
Effectiveness of TN-C-S system to be ascertained 712.414.4
An IT system may be provided (with exceptions) 717.411.6
Notices shall be available near the incoming supply to state
the characteristics 717.514
Wiring systems 717.52
• Supply flexes to H07RN-F min. c.s.a. 2.5mm2
• Internal wiring – singles in conduit – multi-core installed
appropriately
No equipment or wiring to run through gas cylinder storage
areas except ELV controls if unavoidable
• 500mm high, gas tight conduit- AG3
Supply connections to BSEN 60309-2 IP44
Diagrams page 206-207
SECTION 721
Electrical installations in caravans & motor caravans
Installation voltages:a.c. :- not to exceed 230V single-phase 400v single-phase
d.c. :- not to exceed 48V
721.313
This section has an annex for guidance on ELV d.c.
installations page 214
No1
BSEN 60309-2 IP 44
1.8m FROM GROUND.
SUPPLY CABLE max.
25m (+ 2m) 721.55
No2
VOLTAGE,FREQUENCY
LABEL
No3
MAIN SWITCH/RCD
WITH APPROPRIATE
PROTECTIVE 721.411,
721.43, 721.53
8
8
No4
NOTICE STATING METHOD OF CONNECTION TO SITE SUPPLY 721.514
No5
CABLE – STRANDED Min. 1.5mm2, P.C. INSTALLED TROUGHOUT SUPPORTED
FOR FLEXING (AH) 0.4m vertical 0.25m horizontal 721.411, 721.521
No6
LUMINAIRES PREFERABLY FIXED DIRECT, PENDANTS TO HAVE SUPPORT IN
TRANSIT 721.55.2.4
No7
ACCESSIBLE METALLIC PARTS CONNECTED THROUGH MAIN PROTECTIVE
BONDING 721.411.3.1.2
No8
LPG AS SECTION 717
SECTION 740
Temporary electrical installations for […] fairgrounds,
amusement parks & circuses
Supply voltages:230/400v a.c.
440v d.c.
TN-C-S not to be used 740.411.4
300mA time delay RCD at origin, 30mA RCD for lighting,
socket-outlets & mobile equipment up to 32A 740.41
Bonding required for metalwork where animals are kept
Switchgear in cabinets accessible with key 740.51
Equipment Min. IP44
Cables installed in public areas, underground & over
walkways to be suitably mechanically protected, conduit –
class 3, where movement exists – flexible. 740.52
Joints to be avoided 740.526
Each booth/stand to have its own isolator disconnecting all
live conductors 740.537
Equipment 740.55
Luminaires:- suitably IP rated, fixed if below 2.5m, guarded,
fitted to avoid heat concentration
Socket-outlets:- 1 per m2, outside - BSEN 60309-2
Supplies:- permanently marked, labelled, with characteristics
Inspected & tested after each site assembly 740.6
SECTION 753
Floor & ceiling heating systems
30mA RCD for automatic
disconnection of supply
even class II 753.411 to
avoid unwanted tripping
load limited to 7.5kW at
230V
Appropriate design, manufacturers instructions
followed to limit surface temperature & overheating
Ceiling heating to IPX1, floor to IPX7
753.512.2
Plans and instructions to be provided 753.514
Elements not to cross expansion joints 753.515
to
be