TPD1317e Chapter 7
Page 53
(b) Typical system in common use
The bonding system in the boat should provide a low resistance connection between all metals in contact with
sea water, together with a connection to a Zinc sacricial anode which is xed to the outside of the hull below
sea level.
The bonding should consist of heavy stranded wire (not braiding or wire with ne strands). It is an advantage
if the wire is tinned. Insulation is also an advantage and should preferably be green in colour. Although the
current carried by the bonding system will not normally exceed 1 amp, the cable sizes should be generous as
shown in the table below:
Length of run to Zinc Anode Suggested cable size
Up to 30 feet
30 - 40 feet
7 strand / 0.85mm (4mm
2
)
7 strand / 1.04mm (6mm
2
)
As many of the connections may be splashed with sea water they should be soldered wherever possible and
clamped elsewhere, with the joint protected from corrosion by neoprene paint, or a similar material, to exclude
water.
To Next Page
Loading...
