Handbook of Electrical Engineering

CABLES, WIRES AND CABLE INSTALLATION PRACTICES 245 burnt cable, the better is the flame retardant property. IEC60332 Part 3 defi ...

246 HANDBOOK OF ELECTRICAL ENGINEERING In addition to injury to health these acid gases can also cause very corrosive damage to ...

CABLES, WIRES AND CABLE INSTALLATION PRACTICES 247 Reference 1.Kempe’s engineers year book 1998.Chapters C2 and C3, 93rdedition. ...

10 Hazardous Area Classification and the Selection of Equipment 10.1 Historical Developments Some of the earliest work on the su ...

250 HANDBOOK OF ELECTRICAL ENGINEERING Table 10.1. Early publications pertaining to hazardous area classification Institution Do ...

HAZARDOUS AREA CLASSIFICATION 251 The concepts of hazardous area classification and the legislation that supports the subject ar ...

252 HANDBOOK OF ELECTRICAL ENGINEERING occur. This is called the Upper Explosive Limit (UEL), above which no combustion or explo ...

HAZARDOUS AREA CLASSIFICATION 253 The definitions in the USA differ slightly by the use of ‘Class’ rather than ‘Group’. The grou ...

254 HANDBOOK OF ELECTRICAL ENGINEERING during a long period (tens of hours or longer in a year, see Reference 1). The risk of an ...

HAZARDOUS AREA CLASSIFICATION 255 Table 10.4. Enclosure codes for hazardous area equipment Ex or EEx code Brief description d Fl ...

256 HANDBOOK OF ELECTRICAL ENGINEERING The maintenance procedures for working with Ex ‘d’ equipment need to be exercised with ca ...

HAZARDOUS AREA CLASSIFICATION 257 10.5.4 Type of protection ‘m’ Type ‘m’ enclosures are encapsulations, for example an electroni ...

258 HANDBOOK OF ELECTRICAL ENGINEERING Note: Until 1999 the practice in the USA did not recognise type ‘n’ or the certification ...

HAZARDOUS AREA CLASSIFICATION 259 10.5.8 Type of protection ‘q’ This type of protection uses sand or similar dry powder to exclu ...

260 HANDBOOK OF ELECTRICAL ENGINEERING 10.6 Types of Protection for Ingress of Water and Solid Particles PARTICLES 10.6.1 Europe ...

HAZARDOUS AREA CLASSIFICATION 261 Table 10.6. Ingress protection against liquids Forth digit Brief description of the protection ...

262 HANDBOOK OF ELECTRICAL ENGINEERING Table 10.7. Commonly used IP codes for protection of enclosures against particles and liq ...

HAZARDOUS AREA CLASSIFICATION 263 10.6.2.4 Type No. 3R: Rainproof and sleet (ice) resistant An enclosure intended for outdoor us ...

264 HANDBOOK OF ELECTRICAL ENGINEERING 10.6.2.11 Type No. 8: Class I, Group A, B, C or D indoor hazardous locations oil immersed ...

HAZARDOUS AREA CLASSIFICATION 265 lint and dust, seepage, external condensation and spraying of water, oil or coolant. These enc ...