14 | System Planning
STEP DOWN ASSEMBLY
The Main Unit terminals can accommodate lug sizes with up to 25 mm² (4 AWG) cable entry with an M6 stud
hole. If a cable size larger than 25 mm² (4 AWG) is required, a step down assembly needs to be implemented
and must be as close as possible to the Main Unit terminals (within 0.5 m (1'6") of cable length).
The following demonstrate different methods of implementing a step down in cable gauge. Ensure to crimp all
connections with good quality crimp tools and apply heatshrink on top to insulate the connection.
REDARC recommend that any 25 mm² (4 AWG) extension cables used are XLPE insulated to withstand high
temperature environments and can safely conduct any fault currents.
TRIMMED STRANDS IN LUG AND PARALLEL SPLICE
To allow for the larger cable to t into the 25 mm² (4 AWG) cable lug, strip back the cable enough for the
strands to t into a parallel splice and cable lug hole. Insert the cable into the parallel splice and trim down the
remaining strands enough to t into the 25 mm² cable lug.
25mm
Cable Lug
25
– 6 Lug
Cable
> 25 mm
Parallel
Splice
Trimmed
Strands
Strands trimmed
down to 25mm
STEP DOWN BUTT SPLICE
Source a butt splice that is suitable for both cable sizes and assemble by stripping back both cables enough
for the strands to t into the butt splice.
25mm
Cable Lug
25mm
Cable
< 0.5 m (1'6")
Cable
> 25 mm
Step down butt splice
to suit both cables
25 – 6 Lug
STANDARD BUTT SPLICE WITH CONDUCTOR FOLD BACK
Source a butt splice suitable for the larger cable size. To assemble, strip back the 25 mm² (4 AWG) cable
enough to fold back and insert the strands into the butt splice, then strip back the larger cable enough to t
into the other side of the butt splice.
25mm
Cable Lug
25mm
Cable
Cable
> 25 mm
Step down butt splice
to suit larger cable
< 0.5 m (1'6")
25 – 6 Lug
To Next Page
Loading...
Need help?
General