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By
far the largest and most important component of any earthing
or structural lightning protection system is the actual conductor.
Furse
offer a comprehensive range of copper and aluminium conductors
in each of the main world standard formats, ie flat tape,
solid circular and stranded.
Conductor colour chart
|
The
choice of a lightning protection conductor is usually
governed by its aesthetic impact on the structure to be
protected. For many people the term lightning conductor
conjures up an image of a bright green strip running down
the spire of a church. This would clearly be unacceptable
to the owner/architect of a modern structure.
In
order to reduce the impact of an external system Furse
offer a range of UV stabilised PVC covered tapes and solid
circular conductors (only 10mm diameter) in colours chosen
to match common building materials.
Conductor ratings |
|
| Black |
18B29 |
|
| Green |
BS
6746C |
|
| Grey |
00A07 |
|
| Stone |
08B23 |
|
| White |
10B15 |
|
| Brown |
06C39 |
|
|
|
For
below ground earthing applications Furse produce a large range
of bare copper, tape and stranded conductors thus offering the
designer of the system the correctly rated conductor without
the need to oversize.
The following conductor ratings are based upon the recommendations
of
BS 7430 with an initial conductor temperature of 300C and a
maximum temperature of 2500C.
|
Conductor
size |
CSA |
kA
for
1 sec |
kA
for
3 sec |
Part
no |
Conductor
size |
CSA |
kA
for
1 sec |
kA
for
3 sec |
Part
no |
| 12.5
x 1.5mm |
18.75 |
3.3 |
1.9 |
TC005 |
31
x 6mm |
186 |
32.7 |
18.9 |
TC050 |
| 12.5
x 3mm |
37.5 |
6.6 |
3.8 |
TC010 |
38
x 3mm |
114 |
20.1 |
11.6 |
TC055 |
| 20
x 1.5mm |
30 |
5.3 |
3.0 |
TC015 |
38
x 5mm |
190 |
33.4 |
19.3 |
TC060
-FU |
| 20
x 3mm |
60 |
10.6 |
6.1 |
TC020 |
38
x 6mm |
228 |
40.1 |
23.2 |
TC065 |
| 25
x 1.5mm |
37.5 |
6.6 |
3.8 |
TC025 |
40
x 3mm |
120 |
21.1 |
12.2 |
TC067 |
| 25
x 3mm |
75 |
13.2 |
7.6 |
TC030 |
40
x 4mm |
160 |
28.2 |
16.3 |
TC066 |
| 25
x 4mm |
100 |
17.6 |
10.2 |
TC035 |
40
x 5mm |
200 |
35.2 |
20.3 |
TC071 |
| 25
x 6mm |
150 |
26.4 |
15.2 |
TC040 |
40
x 6mm |
240 |
42.2 |
24.4 |
TC068 |
| 30
x 2mm |
60 |
10.6 |
6.1 |
TC039 |
40
x 6.3mm |
252 |
44.4 |
25.6 |
TC069 |
| 30
x 3mm |
90 |
15.8 |
9.1 |
TC042 |
50
x 3mm |
150 |
26.4 |
15.2 |
TC070 |
| 30
x 4mm |
120 |
21.1 |
12.2 |
TC044 |
50
x 4mm |
200 |
35.2 |
20.3 |
TC075 |
| 30
x 5mm |
150 |
26.4 |
15.2 |
TC043 |
50
x 5mm |
250 |
44.0 |
25.4 |
TC078 |
| 31
x 3mm |
93 |
16.4 |
9.5 |
TC045 |
50
x 6mm |
300 |
52.8 |
30.5 |
TC080 |
| 31.5
x 4mm |
126 |
22.2 |
12.8 |
TC048 |
50
x 6.3mm |
315 |
55.4 |
32.0 |
TC082 |
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