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PART SEVEN SPECIAL INSTALLATIONS OR LOCATIONS CHANGE Additions and reorganisation 543 […] high protective conductor currents now section 543 559 Highway.

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Presentation on theme: "PART SEVEN SPECIAL INSTALLATIONS OR LOCATIONS CHANGE Additions and reorganisation 543 […] high protective conductor currents now section 543 559 Highway."— Presentation transcript:

1 PART SEVEN SPECIAL INSTALLATIONS OR LOCATIONS CHANGE Additions and reorganisation 543 […] high protective conductor currents now section Highway power supplies […] now section 559

2 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

3 Section 700 GENERAL Section 701 LOCATIONS CONTAINING A BATH OR SHOWER Section 702 SWIMMING POOLS & OTHER BASINS Section 703 ROOMS & CABINS CONTAINING HOT AIR SAUNAS Section 704 CONSTRUCTION & DEMOLITION SITE INSTALLATIONS Section 705 AGRICULTURAL AND HORTICULTURAL PREMISES Section 706 CONDUCTING LOCATIONS WITH RESTRICTIVE MOVEMENT Section 708 CARAVAN / CAMPING PARKS & SIMILAR Section 709 MARINAS & SIMILAR LOCATIONS Section 710 MEDICAL LOCATIONS (RESERVED)

4 Section 711 EXHIBITIONS, SHOWS & STANDS Section 712 SOLAR PHOTOVOLTAIC (PV) SUPPLIES Section 717 MOBILE OR TRANSPORTABLE UNITS Section 721 […] CARAVANS & MOTOR CARAVANS Section 740 TEMPORARY […] FAIRGROUNDS […] Section 753 FLOOR & CEILING HEATING SYSTEMS

5 Questions asked on special locations - go straight to that section and scan

6 Section 701 Locations containing a bath or a shower Section 702 Swimming pools & other basins Section 703 Rooms & cabins containing sauna heaters Section 704 Construction & demolition sites Section 705 Agricultural & horticultural premises Section 706 Conducting locations with restricted movement Section 708 […] installations in caravan/camping parks […] Section 709 Marinas & similar locations Section 711 Exhibitions, shows & stands Section 712 P.V. power supply systems Section 717 Mobile or transportable units Section 721 […] caravans & motor caravans Section 740 Temporary […] fairgrounds […] circuses Section 753 Floor & heating systems

7 SECTION 701 LOCATIONS CONTAINING A BATH OR SHOWER

8 ZONE 0 Interior of bath/shower (if no basin 0.10m high) ZONE m or height of water outlet ZONE 2 0.6m external to zone 1 ZONE 3 REMOVED to Space under basin :- ZONE 1, If only accessible by tool OUT OF ZONES 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

9 EXTRACTS

10 Supplementary bonding required, can be in proximity. Can be omitted if RCD’s & protective equipotential bonding in situ External influences Activity What are the MINIMUM IP codes for Zone 0 Zone 1&2 IPX7 IPX4 IPX5 Where water jets IPX5 Additional protection by RCD’s Provided for all circuits of the location Electrical separation Electrical separation For 1 item of equipment or 1 single socket SELV PELV To have basic insulation Additional protection

11 Switchgear Switchgear 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 Socket-outlets prohibited within 3m of zone 1 Current using equipment ZONE 0 Fixed, permanent connection, SELV & to relevant standard ZONE 1 Allowed:-Whirlpool units, Showers, Pumps, SELV, Fans, Towel rails, Water heaters, Luminaires

12 If under floor heating is employed it must have an earthed metallic grid or sheath unless SELV

13 SECTION 702 SWIMMING POOLS & OTHER BASINS Applies to fountains, paddling pools

14 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 fountains702.32

15 VOLUME ZONE 0 IPX8 ZONE 1 ZONE 2 1.5m ZONE 1 IPX4 (IPX5) 2.5M WATER JET CLEANING ZONE 2 IPX4 (IPX5 OUTDOOR) (IPX2 INDOOR) 1.5m 2.0m 2.5m A Zones and external influences

16 Swimming Pools ZONE 0,1,2:- Every exposed & extraneous conductive part connected by supplementary protective bonding ZONE 0 1:- No switchgear allowed (exemptions apply to zone ), no socket-outlets (exemptions apply) Only necessary wiring No joint boxes unless SELV ZONE 2:- Socket-outlet permitted if SELV or Automatic disconnection of supply with RCD or Electrical separation Underwater luminaires to relevant standards

17 SECTION 703 ROOMS & CABINS CONTAINING SAUNA HEATERS

18 ZONE 1 Only the heater and directly associated equipment to be installed. ZONE 2 No special requirements for heat resistance. ZONE 3 Equipment suitable for 125°C Cables 170°C All switchgear other than the thermostat and the thermal cut-out to be installed outside the sauna 1m 0.5m

19 SECTION 704 CONSTRUCTION & DEMOLITION SITE INSTALLATIONS Applies to: New Building Construction, Repairs Alterations Extensions, Engineering Construction, Earth Works, Similar Works

20 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 Over 32A – 500mA RCD TN-C-S not to be used (unless fixed building) Cables not run across roadways unless adequately protected Reduced low voltage cables 300/500V thermoplastic Higher voltage cables HO7 RN-F abrasion & water resistant 450/750V

21 Distribution equipment to BSEN Plugs/sockets ≥16A to BSEN To incorporate suitable devices for switching & isolation (lockable) Site Incoming Unit Mains Distribution Unit Transformer Units Outlet Units Extension Outlet Units

22 SECTION 705 Agricultural & Horticultural Premises

23 NO 0.2 DISCONNECTION TIME Automatic Disconnection of supply Circuits with socket-outlets ≤ 32A - 30mA RCD Circuits with socket-outlets > 32A - 100mA RCD All other circuits - 300mA RCD Additional protection Locations with livestock to contain supplementary bonding to inc. the metal floor grid Where no metal grid installed – TN-C-S not recommended

24 Protection against thermal effects Heaters - fixed and away from combustible material & livestock 0.5m or manufacturers instruction. Visual on-off position For fire protection 300mA RCD, S type on circuits not containing socket-outlets External influences Equipment to have Min. IP44 Accessibility Equipment inaccessible to livestock Identification Documentation to include Equipment location plan Routing of concealed cables Distribution flow diagram Equipotential bonding

25 Wiring systems 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 where livestock kept external influences – AF4 conduit (corrosion) :- class 2 – indoor, class 4 – outdoor where vehicles operating external influences – AG3 conduit (impact) :- 5J

26 Isolation equipment installed where it will not be impeded by livestock, clearly marked, break all live conductors Protective bonding conductors shall be protected against mechanical damage, corrosion, & electrolytic effects Socket-outlets and luminaires to comply with appropriate standards, IP codes, and limiting temperature Safety services Where high density livestock rearing exists, food, water, temperature & ventilation:- suitably designed, installed and monitored with standby supplies if required.

27 SECTION 706 Conducting locations with restricted movement (name change)

28 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

29 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

30 Plugs & socket-outlets m No more than 4 sockets at any one point,1 per pitch Equipment to AD4, AE2, AG3 Individual RCD protection & overcurrent protection BSEN IP44 16A min. 20m max. Underground cables 0.6m Overhead 3.5 or 6m

31 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

32 Plugs & socket-outlets m No more than 4 sockets at any one point,1 per craft Individual RCD protection BSEN up to 63A Generally 16A IP44* Close to craft External influences Water:- splashes AD4, IPX4 jets AD5, IPX5 waves AD6, IPX6 AE2, IP3X. AF2. AG2

33 709.3 Connection notice to be supplied page 196

34 SECTION 711 Exhibitions, shows & stands Only TN-S systems to be used for supplies Accessible metallic parts to have protective equipotential bonding All circuits, except emergency lighting, on 30mA RCD Equipment that generates heat to be suitably guarded, installed, as not to cause danger Switchgear in locked cabinet

35 Wiring systems Cables to be mechanically protected i.e. armoured, conduit Min. c.s.a. 1.5mm 2 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 Every separate structure to have isolation Adequate number of socket-outlets for safety reasons Insulation piercing lampholders for festoon lighting to be compatible with cable and non-removable Luminaires below 2.5m to be firmly fixed

36 SECTION 712 Solar photovoltaic (PV) power supply systems PV equipment on the d.c. side considered to be energised at all times Protection by class II preferred for d.c. side PV cables protected against short-circuit currents by appropriate device Wiring loops short (lightning strikes)

37 Equipment & wiring systems selected for external influences Switch disconnectors to be supplied for d.c. side Suitable warning notices fitted

38 SECTION 717 Mobile or transportable units Applies to mobile vehicles & transportable containers/cabins NOT generating sets, caravans, vehicle electrics Automatic disconnection of supply by RCD Accessible conductive parts to be connected through main protective bonding (fine stranded H05V-K Effectiveness of TN-C-S system to be ascertained

39 An IT system may be provided (with exceptions) Notices shall be available near the incoming supply to state the characteristics Wiring systems Supply flexes to H07RN-F min. c.s.a. 2.5mm 2 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 IP44 Diagrams page

40 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 This section has an annex for guidance on ELV d.c. installations page 214

41 No No1 BSEN IP m FROM GROUND. SUPPLY CABLE max. 25m (+ 2m) No2 No2 VOLTAGE,FREQUENCY LABEL No , , No3 MAIN SWITCH/RCD WITH APPROPRIATE PROTECTIVE , , No No4 NOTICE STATING METHOD OF CONNECTION TO SITE SUPPLY No , No5 CABLE – STRANDED Min. 1.5mm 2, P.C. INSTALLED TROUGHOUT SUPPORTED FOR FLEXING (AH) 0.4m vertical 0.25m horizontal , No No6 LUMINAIRES PREFERABLY FIXED DIRECT, PENDANTS TO HAVE SUPPORT IN TRANSIT No No7 ACCESSIBLE METALLIC PARTS CONNECTED THROUGH MAIN PROTECTIVE BONDING No8 No8 LPG AS SECTION

42 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 mA time delay RCD at origin, 30mA RCD for lighting, socket-outlets & mobile equipment up to 32A Bonding required for metalwork where animals are kept Switchgear in cabinets accessible with key Equipment Min. IP44

43 Cables installed in public areas, underground & over walkways to be suitably mechanically protected, conduit – class 3, where movement exists – flexible Joints to be avoided Each booth/stand to have its own isolator disconnecting all live conductors Equipment Luminaires:- suitably IP rated, fixed if below 2.5m, guarded, fitted to avoid heat concentration Socket-outlets:- 1 per m 2, outside - BSEN Supplies:- permanently marked, labelled, with characteristics Inspected & tested740.6 Inspected & tested after each site assembly 740.6

44 SECTION 753 Floor & ceiling heating systems mA RCD for automatic disconnection of supply even class II to avoid unwanted tripping load limited to 7.5kW at 230V Appropriate design, manufacturers instructions to be followed to limit surface temperature & overheating Ceiling heating to IPX1, floor to IPX Plans and instructions to be provided Elements not to cross expansion joints


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