ERICO CADWELD Electrical Connections - Manual (Page 19)

19 www.erico.com
Problem D
The connection is porous
Check for:
1. Presence of moisture either in conductor or mold.
Remedy:
(a) Dry the conductor by wiping and heating.
(b) Heat mold with torch (to above 212°F) or by
igniting welding material in mold without any
conductors, taking care to prevent burns from
the hot material running out of the mold.
NOTE: Do not use the second method of heating if
the mold has wear plates.
Check for:
2. Other contaminants (oil, insulation, etc.) present
in conductors.
Remedy:
(a) Use a safety solvent to wash the conductor,
then dry it.
(b) If insulation is present between strands,
remove it.
Check for:
3. Mold packing material in weld cavity of mold.
Remedy:
(a) Always apply mold packing material to
conductor after mold is closed.
Problem e
The conductors do not weld
Check for:
1. Conductors were not properly cleaned and dried.
Remedy:
(a) Remove oxides with a wire brush. If heavily
oxidized, have fresh-cut conductor end and
use CADWELD
® Heavy Duty molds.
(b) Dry conductors with a torch.
Check for:
2. Conductors not properly positioned in the mold.
Remedy:
(a) Check for proper gap or butting as required
(see the mold tag and read the instructions
packaged with mold).