The difference between the two is the condition of the circuit-breaker after manufacturer's testing. Ill> Ill> Exceptions to normal separation distances, plus conditions to exception Below this figure a non-conducting divider should be inserted between the cables The Building Regulations of Northern Ireland The Building Regulations (Northern Ireland) 2000 (as amended) apply. Note: BS 3036 cb/RCBO Type B cb/RCBO Type C cb/RCBO Type D BS 3036 cb/RCBO Type B cb/RCBO Type C cb/RCBO Type D and 2.5mm is the cross sectional area of the individual live or neutral wires in the 1.5mm or 2.5mm cable. This is not the combined cross sectional area. Each one of the live and neutral wires has a cross sectional area of 1.5mm or 2.5mm.

Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I Appendix J Appendix K Appendix L Eledricity meter The terminals will be sealed by the meter owner to prevent interference by unauthorised persons. A cable is a fairly inflexible (although of course they can be bent) set of wires used to supply the electricity to certain points in your home.terminals are not clamping onto insulation (ii) conductor are not damaged e.g. through "incision" on a solid conductor during insulation removal, or strands removed (iii) conductors are correctly placed, for example on the correct side of a moving plate in a cage-clamp terminal (iv) the permitted number of conductors per terminal is not exceeded (v) no undue mechanical strain on the electrical connection, particularly incoming tails. They have suggested, through surveys, that almost half of all severe electrical injury caused in the home is due to DIY work. The most common causes being drilling through wires in the wall, cutting through cables and not turning electrical circuits off before working on them! In producing the specification, advice should be sought from the installation owner and/ or user as to the intended use. Often, such as in a speculative building, the detailed intended use is unknown. In those circumstances the specification and/or the operation and maintenance manual and building logbook must set out the basis of use for which the installation is suitable. arrangements outside the consumer's installation commonly quoted by distributors are as follows: TN-C -S arrangement - 0.35 0, see Figure 2.1 (i) ll> TN-S arrangement - 0.8 0, see Figure 2.1 (ii) ll> T Table 7.4.2(ii) Internal cables Minimum separation distances between internal low voltage electricity supply cables operating in excess of 50 V AC or 120 V DC to earth, but not exceeding 600 V AC or 900 V DC to earth (Band II), and telecommunications cables (Band 1}.

Preparation of instructions for use. Structuring, content and presentation General principles and detailed requirements and BS 4940 series (1994) Technical information on construction products and services. The size and complexity of the installation will dictate the nature and extent of the manual. Equipment having a protective conductor current exceeding lO rnA should be connected by one of the following methods:It is OK, when working on a building with the old colours, to joint the new to the old as long as the joint itself is done correctly.

Where consumers tails are protected against fault current by the distributors cut-out, the method of installation, maximum length and minimum cross-sectional area (csa) of the tails must comply with the requirements of the distributor.

Cables installed on the surface do not specifically require RCD protection; however, RCD protection may be required for other reasons, for example, for fault protection where the earth fault loop impedance is such that the disconnection time for an overcurrent device cannot be met. With this in mind, ultimately it is the appliances or items that will draw power from the circuit they are powered from and the location in which cables will run that decides on the size of cable required. What Size Cables for Lighting Circuits? Meter tails fall into two categories, supplier's tails and consumer's tails and there is a need to differentiate between the two.

Installation methods for flat twin Table 405 and earth cable in a stud wall with thermal insulation with a minimum U value of 0.1 W/ m2K with the cable touching the inner wall surface, or touching the plasterboard ceiling surface, and the inner skin having a minimum 2 U value of 10 W/m K Persons carrying out electrical work in dwellings must comply with the Building Regulations of England, in particular Part P (Electrical safety - dwellings). Persons responsible for work within the scope of Part P of the Building Regulations may also be responsible for ensuring compliance with other Parts of the Building Regulations, where relevant, particularly if there are no other parties involved with the work. Building Regulations requirements relevant to installers carrying out electrical work include: The lET's Wiring Regulations Policy Committee, therefore, advises the following: A Class I metal consumer unit is installed and each outgoing circuit is protected by an RCBO (b) A split, Class I metal consumer unit is installed, where the double-pole main switch of the consumer unit should incorporate an S type (time delayed) RCCB, e.g. 100 mA S-type R CCB.We would like to thank the following organisations for their continued support: British Cables Association b) at a nominal voltage of 230 V AC single-phase or 400/230 V AC three-phase (c) supplied through a distributor's cut-out having a fuse or fuses rated at 100 A or All extraneous-conductive-parts of the location are effectively connected to the protective equipotential bonding according to Regulation 411.3.1.2. Table 1 – Method 103: Surrounded by thermal insulation including in a stud wall with thermal insulation with cable not touching the wall. Cable size Cables installed on the surface do not specifically require RCD protection, however, RCD protection may be required for other reasons, such as, where the installation forms part of a n system and the earth fault loop impedance values for the overcurrent protective device cannot be met.