Guidance Note 7: Special Locations (IEE Guidence Notes) (No 7)

CONTENTS......Page 3
CO-OPERATING ORGANISATIONS......Page 7
ACKNOWLEDGEMENTS......Page 8
PREFACE......Page 9
International and European Standards......Page 10
Exclusions......Page 11
Body impedance......Page 12
Fig 1.1  Impedances of the human body......Page 13
Fig: 1.2  Zones for equipment in proximity to baths and showers......Page 14
TABLE 1B  Requirements for equipment (current-using and accessories) in locations containing a bath or shower......Page 15
Fig 1.4  Supplementary bonding in a bathroom - plastic pipe installation......Page 16
1.5 Wiring systems......Page 17
1.8 Other equipment......Page 18
1.9 Home laundry equipment......Page 19
2.3 The zones......Page 20
Fig 2.1  Example of determination of the zones of a fountain......Page 21
Fig 2.2  Examples of zone dimensions (plan) with fixed partitions of height at least 2.5 m......Page 22
2.5 Luminaires......Page 23
2.7 Fire alarms and public address systems......Page 24
Additional requirements for the wiring of fountains......Page 25
The wiring......Page 26
Heating elements......Page 27
4.3 Supplies......Page 28
Fig 4.1  Reduced low voltage supplies......Page 29
4.5 Maximum earth fault loop impedances......Page 30
Fixed installation......Page 31
TABLE 4A  FREQUENCY OF INSPECTION AND TESTING OF EQUIPMENT......Page 32
5.2 The risks......Page 33
5.3 Electricity supplies......Page 34
Fig 5.2  Separate RCDs......Page 35
5.5 Earth electrode resistances......Page 36
5.7 External influences......Page 37
Fig 5.3  Large TN farm installation schematic drawing with essential supplies......Page 38
6.3 The particular requirements......Page 39
7.2 The risks......Page 41
Fig 7.1  Time/current zones of effects of a.c. currents 15 Hz to 100 Hz......Page 42
Labelling......Page 43
Fig 7.2  Ring final circuit supplying socket-outlets (total protective conductor current exceeding 10 mA).......Page 44
Fig 7.4  Spurs from a 30 A or 32 A busbar......Page 45
7.6 Requirements for IT systems......Page 46
8.2 The risks......Page 47
8.4.3 Provision of RCDs......Page 48
8.5 Tents......Page 49
Fig 8.1  Typical site distribution for a PME supply, separation from PME earth at main distribution board......Page 50
Fig 8.2  Typical site distribution for a PME supply, separation from PME earth at pitch supply point......Page 51
Fig 8.3  Ground surface potentials around a single rod and three rods in line......Page 52
9.3 The risks......Page 53
9.5 Supplies......Page 54
9.8 Isolating transformers......Page 55
9.10 Wiring systems......Page 56
Fig 9.1  Typical wiring arrangement from shore to pontoon......Page 58
9.11 Distribution boards, feeder pillars and socket-outlets......Page 59
Fig 9.2  Notice for shore supplies with direct connection to earth......Page 61
Fig 9.3C - On-shore mounted isolating transformer (hull and metal parts bonded)......Page 62
9.12 General Notes......Page 63
10.2 The risks......Page 65
10.3 Patient safety......Page 67
TABLE 10A  Examples of allocation of group numbers and classification for safety services of medical locations......Page 68
TN systems......Page 69
Medical IT system (4)......Page 70
External Influences......Page 71
Fig 10.1  Typical IT system with insulation monitoring......Page 72
Fig 10.2  Patient environment......Page 73
10.12 Changeover requirements for safety power supply sources......Page 74
TABLE 10B  Classification of safety services for medical locations......Page 75
Initial verification......Page 76
10.17 Recommendations from the UK Health Departments......Page 77
HTM 2011-Emergency Electrical Services......Page 78
11.2 Protection against electric shock......Page 79
Distribution circuits......Page 80
11.4 Protection and identification of cables......Page 81
Fig 11.1  Preferred layout for mains in a 2 m footway for new works......Page 82
11.6 Temporary supplies......Page 83
Fig 11.2  Temporary supplies from columns - alternative arrangements......Page 84
11.10 References......Page 85
12.2 The Electricity Safety, Quality and Continuity Regulations 2002......Page 86
PV inverter......Page 87
(2) Protection against both direct and indirect contact......Page 88
(5) Protection against short-circuit current......Page 89
(3) Wiring systems......Page 90
Types of system earthing......Page 91
Fig 12.1  PV installation - general schematic, one array......Page 92
Fig 12.2  PV installation - example with more than one array......Page 93
Protection by automatic disconnection of supply......Page 94
Fig 13  Exhibition/show distribution with standby generator......Page 95
13.6 Isolation......Page 96
Electrical connections......Page 97
Socket-outlets......Page 98
13.12 Inspection and testing......Page 99
14.5 Protection against overheating......Page 100
14.9 Wiring systems......Page 101
14.11 Information from the contractor for the user of the installation......Page 102
Fig 15  SELV lighting installation with parallel operation of transformers and  insulated conductors......Page 104
15.7 Locations with risks of fire due to the nature of processed or stored materials......Page 105
15.10 Suspended systems......Page 106
15.14 Equipment marking......Page 107
16.2 Buried cables......Page 109
16.5 Ponds......Page 110
17.3 The risks......Page 111
17.4.1  General......Page 112
17.4.2  PME networks......Page 113
17.6.1 Connection to low voltage generator......Page 114
Fig 17.A.2  Connection to a Class II low voltage generating set located outside  the unit......Page 115
17.6.2 Connection to a TN or TT fixed electrical installation......Page 116
Fig 17.B.2  Connection to a TN or TT electrical installation,  with protection by earth free local equipotential bonding with a......Page 117
Fig 17.B.3  Connection to a single or three-phase fixed installation, suitable for......Page 119
Fig 17.C.1  Connection to a fixed electrical installation with any type of earthing system,......Page 120
Fig 17.C.3  Connection to a fixed electrical installation  with any type of earthing system (using simple separation and an......Page 121
Fig 17.D  Connection to a fixed electrical installation with any type of earthing system using electrical separation......Page 123
17.7.3 Protection by the use of Class II equipment or equivalent insulation......Page 124
17.9 Wiring systems......Page 125
17.11 Plugs and sockets......Page 126
17.12 General notes......Page 127
18.2 Engineering Recommendation G83......Page 128
Fig 18.1  Isolation of the SSEG......Page 129
Fig 18.3  Earthing of parallel operation SSEG......Page 130
Fig 18.4  Example of circuit diagram for an SSEG installation from Engineering Recommendation G83......Page 131
Fig 18.5  Stirling Engine......Page 132
C......Page 133
D......Page 134
H......Page 136
M......Page 137
P......Page 139
S......Page 140
Z......Page 141
Tables & figs......Page 0