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.13.
IEE Regulation 110. The lethal level approximately 50mA, above which
muscles contract, the heart flutters and breathing stops. 1.12
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.1 tells that ALL the regulations apply temporary
electrical installations such construction sites.
Portable tools must fed from 110V socket outlet unit (see Fig. shock above the
50mA level therefore fatal unless the person quickly separated from
the supply.
Definition
Electric shock occurs when person
becomes part the electrical circuit. However, stated previously this chapter, construction sites
are dangerous places and the temporary electrical supplies must safe. 1.12(a))
incorporating splash-proof sockets and plugs with keyway which pre-
vents tool from one voltage being connected the socket outlet dif-
ferent voltage. 1.
. Regulation 704.12(b). The level intensity the shock will depend
upon many factors, such age, fitness and the circumstances which
the shock received.The legal responsibilities both employers and employees
29
lighting.313. The frequency inspec-
tion construction sites increased every months because the
inherent dangers.
Electric shock occurs when person becomes part the electrical cir-
cuit, shown Fig.
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.
Electric shock
(a) (b)
FIGURE 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
