Construction site installations permanent installation

Subpart K deals with the means of providing electrical power, both permanent and temporary, to a jobsite. Subpart K also states that the electrical standards do not apply to existing permanent installations that were on the site before construction began. There are four major divisions of this subpart including installation safety requirements, safety-related work practices, maintenance and environmental considerations, and requirements for speciai equipment. 

OSHA s standard at 1910.303(b)(2), Installation and Use, requires that Listed or labeled equipment shall be Installed and used in accordance with any instructions included In the listing or labeling. Manufacturers and nationally recognized testing laboratories determine the proper uses for power strips. For example, the UL Directory contains instructions that require UL-listed RPTs to be directly connected to a permanently Installed branch circuit receptacle they are not to be series-connected to other RPTs or connected to extension cords. UL also specifies that RPTs are not intended for use at construction sites and similar locations. 

Section 551 was introduced by Amendment 2 and applies to low voltage installations that incorporate generating sets running either continuously or in stand-by mode for permanent and temporary installations. This would include, for example, generators supplying temporary accommodation on construction sites and diesel generator sets operating in stand-by mode in hospitals. 

Subsection 611-03 recognises that many installations do not have isolating switches and are fed from the supply company s combined cut-out, neutral link and sealing box on the end of the service cable, so in such cases electrical maintenance is restricted to qualified persons. The restriction does not apply to relamping if an isolating switch is available. Supplies are sometimes taken from street furniture to feed temporary installations such as market stalls, Christmas decorative street lighting and small roadworks. Subsection 611-06 requires no impairment of the safety of the permanent installation so it must not be overloaded and the connection must be safe. The temporary installation should comply generally with section 604 for construction sites. 

Both temporary and permanent electrical supply installations should be installed in accordance with the latest addition of BS 7671 (lEE Wiring Regulations and the Electricity at Work Regulations 1989). Installations, particularly if of a temporary nature, for example in construction works, must be inspected regularly and tested at intervals no greater than those specified by the installation company. It should be noted that if temporary installations are in position for a greater period than 3 months on a construction site then they should be subject to test in line with HSE guidance every 3 months or when they have been altered. 

The control of use and installation of gas supplies on a construction site must also adhere to the same requirements as those on permanent sites. Installation must be by a CORGI registered gas fitter and it is... 

Cranes are any lifting machine and associated parts where the movement of the load is not restricted by guides or rails. The description includes permanent fixed installations in buildings such as overhead traveling cranes, temporary installations typically found on construction and building sites, self-contained mobile cranes and hand-operated chain pulley blocks. 

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