1 tells that ALL the regulations apply temporary
electrical installations such construction sites.
.
Socket outlet and plugs are also colour-coded for voltage identification:
25V violet, 50V white, 110V yellow, 230V blue and 400V red, shown in
Fig.
IEE Regulation 110.13. The frequency inspec-
tion construction sites increased every months because the
inherent dangers. The level intensity the shock will depend
upon many factors, such age, fitness and the circumstances which
the shock received. Regulation 704.12(a))
incorporating splash-proof sockets and plugs with keyway which pre-
vents tool from one voltage being connected the socket outlet dif-
ferent voltage.12
110 volts distribution unit and cable connector suitable for construction site electrical supplies: (a)
reduced-voltage distribution unit incorporating industrial sockets 4343; (b) industrial plug and
connector. The lethal level approximately 50mA, above which
muscles contract, the heart flutters and breathing stops. However, stated previously this chapter, construction sites
are dangerous places and the temporary electrical supplies must safe.
Definition
Electric shock occurs when person
becomes part the electrical circuit.
Portable tools must fed from 110V socket outlet unit (see Fig. 1. 1. Below 50mA only unpleasant tingling sensation may be
experienced you may thrown across room, roof ladder, but the
resulting fall may lead serious injury.12(b).The legal responsibilities both employers and employees
29
lighting. 1.313.
Electric shock occurs when person becomes part the electrical cir-
cuit, shown Fig. shock above the
50mA level therefore fatal unless the person quickly separated from
the supply.
Electric shock
(a) (b)
FIGURE 1.4 recommends the following voltages
for distributing plant and equipment construction sites:
400V fixed plant such cranes
230V site offices and fixed floodlighting robustly installed
110V portable tools and hand lamps
SELV portable lamps used damp confined places
