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PART SEVEN SPECIAL INSTALLATIONS OR LOCATIONS CHANGE Additions and reorganisation

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

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PART SEVEN SPECIAL INSTALLATIONS OR LOCATIONS CHANGE Additions and reorganisation

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  1. PART SEVENSPECIAL INSTALLATIONS OR LOCATIONSCHANGEAdditions and reorganisation • […] high protective conductor currents now section 543 • 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 711EXHIBITIONS, SHOWS & STANDS Section 712SOLAR PHOTOVOLTAIC (PV) SUPPLIES Section 717MOBILE OR TRANSPORTABLE UNITS Section 721 […] CARAVANS & MOTOR CARAVANS Section 740TEMPORARY […] FAIRGROUNDS […] Section 753FLOOR & 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 711 Exhibitions, shows & stands Section 712 P.V. power supply systems Section 702 Swimming pools & other basins 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

  7. SECTION 701LOCATIONS CONTAINING A BATH OR SHOWER

  8. ZONE 0 Interior of bath/shower (if no basin 0.10m high) • ZONE 12.25m or height of water outlet • ZONE 20.6m external to zone 1 • ZONE 3 REMOVED • 701.32.2to701.32.4 • Space under basin :- ZONE 1, If only accessible by tool OUTOF 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

  9. EXTRACTS

  10. Additional protection by RCD’s 701.411.3.3 • Provided for all circuits of the location • Electrical separation701.413 • 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 ActivityWhat are the MINIMUM IP codes for Zone 0 Zone 1&2 IPX7 IPX4 Where water jetsIPX5

  11. 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-outletsas above and shaver outlets to BSEN 61558-2-5 Socket-outlets prohibited within 3m of zone 1 Current using equipment 701.55 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 gridor sheathunless SELV 701.753

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

  14. Zones changed from alphabetical to numeral Zone 0The interior of the basin Zone 1 2mfrom the rimof the basin and a height of2.5m Zone 2 1.5m external to zone 1 No zone 2 for fountains 702.32

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

  16. 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

  17. SECTION 703ROOMS & 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 3 1 0.5m 1m 2 0.5m 1 0.5m

  19. SECTION 704CONSTRUCTION & DEMOLITION SITE INSTALLATIONS Applies to:- New Building Construction, Repairs Alterations Extensions, Engineering Construction, Earth Works, Similar Works 704.1.1

  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 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

  21. 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

  22. SECTION 705Agricultural & Horticultural Premises

  23. 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

  24. 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 • Routing of concealed cables • Distribution flow diagram • Equipotential bonding

  25. 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

  26. 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.

  27. SECTION 706Conducting 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 708Electrical 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

  30. Plugs & socket-outlets 708.553.1 No more than 4 sockets at any one point,1 per pitch Equipment to AD4, AE2, AG3 Underground cables 0.6m Overhead 3.5 or 6m BSEN 60309-2 IP44 16A min. Individual RCD protection & overcurrent protection 20m max. 0.5-1.5m

  31. SECTION 709Marinas & 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

  32. 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 Individual RCD protection 709.531.2 BSEN 60309-2 up to 63A Generally 16A IP44* 0.3 - 1m Close to craft

  33. Connection notice to be supplied 709.3 page 196

  34. SECTION 711Exhibitions, 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

  35. 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

  36. SECTION 712Solar 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 device712.434 Wiring loops short (lightning strikes) 712.444.4.4

  37. 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

  38. SECTION 717Mobile 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-K0712.411.3.1.2 Effectiveness of TN-C-S system to be ascertained 712.414.4

  39. 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

  40. SECTION 721Electrical installations in caravans & motor caravans • Installation voltages:- • a.c. :- not to exceed 230V single-phase 400v single-phase • d.c. :- not to exceed 48V721.313 • This section has an annex for guidance on ELV d.c. installations page 214

  41. No1BSEN 60309-2 IP 44 1.8m FROM GROUND. SUPPLY CABLE max. 25m (+ 2m) 721.55 No2VOLTAGE,FREQUENCY LABEL No3 MAIN SWITCH/RCD WITH APPROPRIATE PROTECTIVE 721.411, 721.43, 721.53 8 8 No4NOTICE STATING METHOD OF CONNECTION TO SITE SUPPLY 721.514 No5CABLE – 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 No7ACCESSIBLE METALLIC PARTS CONNECTED THROUGH MAIN PROTECTIVE BONDING 721.411.3.1.2 No8LPG AS SECTION 717

  42. SECTION 740Temporary 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

  43. 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

  44. SECTION 753Floor & ceiling heating systems 30mA RCD for automatic disconnection of supply even class II 753.411to 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 IPX7753.512.2 Plans and instructions to be provided 753.514 Elements not to cross expansion joints753.515

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