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• The use of copper conductors are recommended and should have a cross sectional area of
not less than 35mm
steel as downconductors is permitted in compliance to most international standards.
• Recommended copper conductor size is 25mm x 3mm.
• The copper should be of a grade normally used for commercial electrical work.
• Suitable fasteners should be installed to adequately secure all
downconductors.
• Downconductors should be fastened at spacings not exceeding 1.0m on horizontal runs
and not exceeding 2m on vertical runs.
Installation of Guardian CAT GI Terminal to
threaded pipe
LPI offers within its range of Guardian CAT terminals, a GI version which is designed for a
threaded connection to a 2 inch GI pipe. Please refer to drawing CTA-05 on page 9 and figure 14
(page 23) for further details.
The Guardian CAT GI terminal is supplied with a threaded coupler (female thread) fixed to the
terminal and designed for connection to a 2 inch BSP pipe (Male thread).
• Following installation of the Guardian CAT GI terminal to the threaded pipe as per drawing
CTA-05 and figure 14, it will be necessary to connect the metallic pipe to a conventional
downconductor in order to convey the lightning energy to the earthing system.
• Ideally the connection between the metallic pipe and the conventional downconductor
should be completed by lugging or exothermically welding (LPI EXOWELD) the
downconductor at a practical point somewhere along the length of the pipe.
• Particular care should be taken to ensure that compatible metals are used when
connecting the downconductor to the metallic pipe.
• For installation details of the conventional downconductor please review instructions and
comments as detailed under the heading Installation of Conventional Downconductors on
page 20.
22
Guardian Install Manual V12.indd 24
2
. In addition, the use of PVC copper, bare aluminium and stainless
Document 36 II Guardian
Version 1.02
© Copyright 2008 LPI
22/9/08 4:25:24 PM
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