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IEE REGULATIONS 16TH EDITION PDF

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17th Edition IEE Wiring Regulations (BS ). Darrell Locke IEng .. the 16th Edition; many changes were due to formal incorporation of CENELEC. items With the 18th Edition of the IET Wiring Regulations come new recommendations as well as increased levels of regulation. Whether that's in the form. It is not a guide to the Regulations or a replacement for them; nor does it seek to interpret them Regulation by Regulation. It should, in fact, be read in conjunction .


Iee Regulations 16th Edition Pdf

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16th Edition IEE Wiring Regulations Explained and Illustrated By the same author Electrical Installation Work Wiring 3MB Size Report. DOWNLOAD PDF. 16th Edition IEE Wiring Regulations. Explained & Illustrated. Brian Scaddan 7th Edition. Used alongside the regulations themselves, this book is the key to safe. 16th Edition IEE Wiring Regulations. Inspection, Testing & Certification. 5th Edition Brian Scaddan. This text is a practical guide to the current inspection and .

Even 41 Earthing Figure 14a Residual current device Figure 14b Three-phase RCD Figure 14c Connections for single phase 42 Earthing if they are unequal, the out of balance current flows in the neutral which cancels out this out of balance current.

Figure 14 b shows the arrangement of a three-phase RCD, and Figure 14 c , how it can be connected for use on single-phase circuits. Nuisance tripping Certain appliances such as cookers, water heaters and freezers tend to have, by the nature of their construction and use, some leakage currents to earth.

These are quite normal, but could cause the operation of an RCD protecting an entire installation. This can be overcome by using split-load consumer units, where socket outlet circuits are protected by a 30 mA RCD, leaving all other circuits controlled by a normal mains switch.

One area where the use of 30 mA RCDs is required is in the protection of socket outlets intended for the connection of portable appliances for use outside the main equipotential zone. Hence, socket outlets in garages or even within the main premises which are likely to be used for supplying portable tools such as lawn mowers and hedge trimmers must be protected by an RCD rated at 30 mA or less.

All other equipment outside the main equipotential zone should, in the event of an earth fault, disconnect in 0.

An exception to the RCD requirement is where fixed equipment is connected to the supply via a socket outlet, provided that some means of preventing the socket outlet being used for hand-held appliances is ensured. The confusion may have arisen because of a lack of understanding of earthing and bonding. Hopefully, this chapter will rectify the 43 Earthing situation. In general the only Supplementary bonding required in a domestic premises is in a bathroom. By now we should know why bonding is necessary; the next question, however, is to what extent bonding should be carried out.

This is perhaps answered best by means of question and answer examples: 1 Q: Why do I need to bond the hot and cold taps and a metal kitchen sink together? Surely they are all joined anyway?

A: In most sinks the holes for connection of the taps are usually surrounded by a plastic insert which tends to insulate the taps from the sink. The hot and cold taps are both parts of different systems and could originate from outside the equipotential zone. These, therefore, could be extraneous conductive parts and may need to be bonded together, although there is no specific requirement in BS to do this.

16th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations

A: Supplementary bonding is only necessary when extraneous conductive parts are simultaneously accessible with exposed conductive parts and the disconnection time for the circuit concerned cannot be achieved. A: In general, no. Apart from the fact that most window frames will not introduce a potential from anywhere, the part of the window most likely to be touched is the opening portion, to which it would not be practicable to bond. There may be a case for the bonding of patio doors, which could be considered earthy with rain running from the lower portion to the earth.

However, once again the part most likely to be touched is the sliding section, to which it is not possible to bond. In any case there would need to be another simultaneously accessible part to warrant considering any bonding.

A: Bathrooms are particularly hazardous areas with regard to shock risk, as body resistance is drastically reduced when wet.

Hence, supplementary bonding between exposed conductive parts must be carried out in addition to their existing CPCs.

Also of course, taps and metal baths may need bonding together, and to other extraneous and exposed conductive parts.

It may be of interest to note that in older premises a toilet basin may be connected into a cast iron collar which then tees outside into a cast iron soil pipe. This arrangement will clearly introduce earth potential into the bathroom, and hence the collar should be bonded to any simultaneously accessible conductive parts. This may require an unsightly copper earth strap.

However, if these bonding conductors are connected to exposed conductive parts, they must be the same size as the CPC connected to the exposed conductive part, once again subject to the minimum sizes mentioned.

A: No. View on ScienceDirect. Brian Scaddan.

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16th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations

Free Shipping Free global shipping No minimum order. English Copyright: A three-phase RCD works on the same out of balance principle, in this case the currents flowing in the three phases when they are all equal, sum to zero, hence there is no resultant magnetism. Even 41 Earthing Figure 14a Residual current device Figure 14b Three-phase RCD Figure 14c Connections for single phase 42 Earthing if they are unequal, the out of balance current flows in the neutral which cancels out this out of balance current.

Figure 14 b shows the arrangement of a three-phase RCD, and Figure 14 c , how it can be connected for use on single-phase circuits. Nuisance tripping Certain appliances such as cookers, water heaters and freezers tend to have, by the nature of their construction and use, some leakage currents to earth. These are quite normal, but could cause the operation of an RCD protecting an entire installation.

This can be overcome by using split-load consumer units, where socket outlet circuits are protected by a 30 mA RCD, leaving all other circuits controlled by a normal mains switch. One area where the use of 30 mA RCDs is required is in the protection of socket outlets intended for the connection of portable appliances for use outside the main equipotential zone. Hence, socket outlets in garages or even within the main premises which are likely to be used for supplying portable tools such as lawn mowers and hedge trimmers must be protected by an RCD rated at 30 mA or less.

All other equipment outside the main equipotential zone should, in the event of an earth fault, disconnect in 0.

An exception to the RCD requirement is where fixed equipment is connected to the supply via a socket outlet, provided that some means of preventing the socket outlet being used for hand-held appliances is ensured. The confusion may have arisen because of a lack of understanding of earthing and bonding. Hopefully, this chapter will rectify the 43 Earthing situation. In general the only Supplementary bonding required in a domestic premises is in a bathroom.

By now we should know why bonding is necessary; the next question, however, is to what extent bonding should be carried out. This is perhaps answered best by means of question and answer examples: 1 Q: Why do I need to bond the hot and cold taps and a metal kitchen sink together? Surely they are all joined anyway?

A: In most sinks the holes for connection of the taps are usually surrounded by a plastic insert which tends to insulate the taps from the sink. The hot and cold taps are both parts of different systems and could originate from outside the equipotential zone. These, therefore, could be extraneous conductive parts and may need to be bonded together, although there is no specific requirement in BS to do this. A: Supplementary bonding is only necessary when extraneous conductive parts are simultaneously accessible with exposed conductive parts and the disconnection time for the circuit concerned cannot be achieved.

A: In general, no. Apart from the fact that most window frames will not introduce a potential from anywhere, the part of the window most likely to be touched is the opening portion, to which it would not be practicable to bond. There may be a case for the bonding of patio doors, which could be considered earthy with rain running from the lower portion to the earth. However, once again the part most likely to be touched is the sliding section, to which it is not possible to bond.

In any case there would need to be another simultaneously accessible part to warrant considering any bonding. A: Bathrooms are particularly hazardous areas with regard to shock risk, as body resistance is drastically reduced when wet. Hence, supplementary bonding between exposed conductive parts must be carried out in addition to their existing CPCs.

Also of course, taps and metal baths may need bonding together, and to other extraneous and exposed conductive parts. It may be of interest to note that in older premises a toilet basin may be connected into a cast iron collar which then tees outside into a cast iron soil pipe. This arrangement will clearly introduce earth potential into the bathroom, and hence the collar should be bonded to any simultaneously accessible conductive parts.

This may require an unsightly copper earth strap. However, if these bonding conductors are connected to exposed conductive parts, they must be the same size as the CPC connected to the exposed conductive part, once again subject to the minimum sizes mentioned.This is little different to a block of flats each flat representing a caravan with a main intake feeding the various units.

Zone 3 2. They may be caused, for example, by faulty appliances or by surges due to motors starting or by plugging in too many appliances in a socket outlet circuit. The perfect circle of conductor is achieved by cross-connecting the phase and neutral loops of the ring Figure There are also requirements for safety services, such as emergency escape lighting.

This EMF in turn drives a current through the trip coil, causing operation of the tripping mechanism. This may be measured in existing installations using a phaseto-earth loop impedance tester.

Method 3 can, in some cases, result in pessimistically large cable sizes.

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