• The ohmic resistance must be within -5 to +10
% of the value labelled.
• The insulation resistance should read >20 MΩ
after one minute at min. 500V DC.
3�1
Installing heating elements
Observe all instructions and guidelines in section 1.1
Heating elements
• Position the heating element so that it is at
least half the C-C distance from obstacles.
• Elements must always be in good contact with
the heat distributor (e.g. concrete).
Heating mats
• Always roll out heating mats with the heating
cables facing up.
• When the heating mat reaches the area bound-
ary, cut the liner/net and turn the mat before
rolling it back.
Extending cold leads
• Avoid extending cold leads if possible. Wire
cold leads to e.g. junction boxes or cable wells.
• Be aware of power loss in the cable according
to local regulations.
4
Applications
4�1
Frost protection of roof and gutters
1
2
3
4
5
6
7
1. Roof edge / eave
2. Gutter
3. Downpipe to frost-free well
4. Gutter valley
5. Flat roof with drain
6. Roof with baffles
7. Downpipe with open end
To provide sufficient heat in gutters and down pipes,
the heat density and the number of cable lines [n]
depends on:
• design temperature
