Our contractor failed to insert a 200 amp fuse correctly in a 3 phase 480 volt disconnect switch and powered the circuit anyway. Four weeks later, we discovered the molten mess and made repairs.
The 3/0 Cu wire of the damaged phase suffered major deterioration. The contractor cut and spliced a new 6 inch section of Cu wire using an Al barrel crimp connector within the disconnect to replace the damaged section.
Since then, a debate has ensued regarding this solution. In the medium to long term, is this splice a reliable solution, or will this phase be subject to excess heating and premature failure as the splice length is so short? The load is harmonic rich computer equipment.
The 3/0 Cu wire of the damaged phase suffered major deterioration. The contractor cut and spliced a new 6 inch section of Cu wire using an Al barrel crimp connector within the disconnect to replace the damaged section.
Since then, a debate has ensued regarding this solution. In the medium to long term, is this splice a reliable solution, or will this phase be subject to excess heating and premature failure as the splice length is so short? The load is harmonic rich computer equipment.