Splicing The Motor Cable - Grundfos SP Instrucciones De Instalación Y Funcionamiento

6.4 Splicing the motor cable

A good cable splice is critical to
proper operation of the
Note
submersible pump and must be
done with extreme care.
If the splice is carefully made, it will work as well
as any other portion of the cable, and will be
completely watertight. Grundfos recommends
using a heat shrink splice kit. The splice should
be made in accordance with the kit
manufacturer's instructions. Typically a heat
shrink splice can be made as follows:
1. Examine the motor cable and the
submersible drop cable carefully for damage.
2. Cut the motor leads off in a staggered
manner. Cut the ends of the drop cable so
that the ends match up with the motor leads.
See fig. 6. On single-phase motors, be sure
to match the colors.
3. Strip back and trim off 1/2 inch of insulation
from each lead, making sure to scrape the
wire bare to obtain a good connection.
Be careful not to damage the copper
conductor when stripping off the insulation.
4. Slide the heat shrink tubing on to each lead.
Insert a properly sized "Sta-Kon" type
connector on each lead, making sure that
lead colors are matched. Using "Sta-Kon"
crimping pliers, indent the lugs. See fig. 7.
Be sure to squeeze hard on the pliers,
particularly in the case of a large cable.
5. Center the heat shrink tubing over the
connector. Using a propane torch, lighter, or
electric heat gun, uniformly heat the tubing
starting first in the center working towards
the ends. See fig. 8.
6. Continue to apply the heat to the tubing
taking care not to let the flame directly
contact the tubing. When the tubing shrinks
and the sealant flows from the ends of the
tubing, the splice is complete. See fig. 9.
Fig. 6 Cutting and stripping the motor
leads
Fig. 7 Crimping the connectors
Fig. 8 Applying heat to the connector
Fig. 9 Completed splices
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