• Remove Red insulating terminal shrouds and loosen the exposed cable clamping screws.
• Fit bared conductor end into fuse base terminal, and tighten cable clamping screw to secure.
• Replace clip action Red insulating terminal shroud

Cable selection and termination

• Ensure cable sizes are correctly chosen in line with the IEE Wiring Regulations (BS 7671), making due allowance for :

i. Grouping of cables (correction factor Cg).
ii. Ambient temperature / internal enclosure temperature (correction factor Ca).

• Ensure that maximum cable core temperature is restricted to 70°C or less.
• Ensure adequate cable length is provided for interconnections between fuse holders or other components. This will prevent possible heat input to the fuse holder which could result in overheating.
• If flexible cables are used, their relatively fine strands must be given increased protection by the use of thin wall copper ferrules crimped over the conductor ends. The following should be taken into account:

i. The inside diameter of the ferrule should match that of the bared cable ends.
ii. The ferrule lengths should be the same length as the cable entry tunnel in the fuse base terminals.
iii. The termination screw should compress the wall of the ferrules providing further consolidation of the cable strands within the ferrule.

• When used in banks, ensure that the diversity factors recommended in BS5486 Part 11, Factory Built Assemblies, are applied. If the number of fuse holders banked together exceeds 12 a 0.6 diversity factor may be used.
• For applications when there is insufficient or no diversity applied, adequate compensation should be made by a combination of some, or all, of the following:

i. Utilise higher standard current rated fuse links, or motor rated fuse links.
ii. Increase the cable size.
iii. Ensure that fuse holders in the bank are separated by at least 5mm.
iv. Ensure that there is adequate spacing between fuse banks if they are stacked vertically. Typically, depending on rating, this would be 30-50mm.
v. Incorporate natural or forced ventilation. These measures should ensure that the heat is adequately exported from the fuses.

• Sharp bends in cables, especially near termination points, should be avoided in order to prevent damage to cable cores or insulation and to ensure that no mechanical strain, is put on the contact block in the fuse base.
• The minimum torque values detailed in the attached table should be applied to cable terminal and fuse link fixing screws.