Selecting The Correct Size Of Joint And/Or End Cap - Raychem nvent MI Series Manual

3
Heating Cable Repair
3.2

Selecting the Correct Size of Joint and/or End Cap

Use a vernier caliper or micrometer to measure the
outside diameter of the heated section and/or the
cold lead section. Select the 1/2 in (13 mm) or 3/4 in
(19 mm) stainless steel or brass joint from Table 5 or
Table 6. If the heating cable is polymer jacketed, strip
back the jacket and measure the diameter of the
bare copper cable.
TABLE 5: SELECTING JOINT SIZE FOR DESIGN B, D, OR E
ALLOY 825 SHEATH HEATING CABLES
1/2 in (13 mm) stainless steel joint
For heated-section to
heated-section joint
Max. diameter
heated-section cable
0.325 in
3/4 in (19 mm) stainless steel joint
For heated-section to
heated-section joint
Max. diameter
heated-section cable
0.543 in
and the cold lead section is copper sheath, use
the stainless steel joint.
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For heated-section to cold lead section
joint
Max. diameter
heated-section
cable
0.292 in
For heated-section to cold lead section
joint
Max. diameter
heated-section
cable
0.480 in
Note: If heated section is Alloy 825 sheath
Max. diameter cold
lead section cable
0.325 in
Max. diameter cold
lead section cable
0.543 in