Special Installations: Construction sites, EMU, voltage levels, regulation requirements, circuits and protection - 8 questions from a bank of questions
What section of BS7671:2018 is devoted to these types of installation ?
701
704
708
710
Shown here is a BSEN60309-2 plug/socket. What colour is a 400v 32A version ?
blue
red
violet
yellow
Shown here is a BSEN60309-2 plug/socket. What colour is a 230v 16A version ?
blue
red
violet
yellow
What voltage is a yellow BSEN60309-2 plug/socket ?
400v
110v
50v
230v
What is an EMU ?
an electrical monitoring unit
an earth monitoring unit
an earth metering unit
an electrical metering unit
What does the BS7671 detail about cables to be installed across a site roadway or walkway ?
they must be installed only along the edges of road and walkways
they must not be installed unless protected from mechanical damage
they must be installed 5.8m above ground level
there are no particular routing requirements
What type of cable is used for main and sub-main distribution around a building site ?
SWA
Steel conduit system
yellow HD 'arctic' flex
BUSBAR system
There are occasions where electrical/other work needs to be carried out in confined areas. For inspection lamps and other types of tools used in these area, what voltage should this equipment be?
SELV only in this area
normal 110v equipment
230v equipment with RCD protection
Battery powered equipment only
What is the function of the keyway on a BSEN60309-2 plug/socket?
so only authorised persons can operate it
so different plugs and sockets cannot be interchanged
for easy identification purposes
to help secure the retractable lid
How often should this type of installation be inspected and tested ?
every day
once a month
every 3 months
yearly
What is an ACS in relation to this type of location?
Advanced Construction Scheme
Assembly for Construction Sites
Automatic Connection of the Supply
Automatic Contactor System
identify the rating of RCD to be used for automatic disconnection of the supply in the case of a fault in socket outlets exceeding 32A, in this type of location.