what is the function of the small 'copper strap' that links two pieces of metallic trunking together ?
to strengthen the connection
to help ensure a continuous earth
to allow for expansion`
to allow for the attachment of extra fittings
what is 'grommet strip' used for ?
to make trunking 'air tight'
to ensure good earth continuity
to support cables inside trunking
to protect conductor insulation
where would a 'fire barrier' be fitted ?
where trunking passes between floors
every 0.5 metres inside trunking
where trunking passes between walls
where trunking passes between floors or walls
in an office, what type of trunking is likely to be installed around the bottom of the wall ?
dado
skirting
suspended-floor
busbar
in a machine shop, what type of trunking is likely to be installed to allow frequent relocation of machine tools?
dado
skirting
suspended-floor
busbar
why are flexible conductive straps fitted inside 'bus-bar' trunking ?
to provide good earthing
to allow for expansion and contraction due to temperature
to provide easy maintenance
to allow for easy additions to the system
what type of trunking is fitted level with the floor and provides easy access points ?
skirting
suspended-floor
flush-floor
under-floor
what type of trunking is designed primarily for luminaries ?
dado
skirting
lighting
suspended
what is the function of 'compartmented' trunking ?
to separate BAND I and BAND II circuits
to separate lighting and power circuits
to separate single and 3-phase circuits
to separate BAND II and BAND III circuits
Identify the preferred type of trunking that would best suit the installation of multiple light fittings in a department store, that may require frequent relocation?