An electrical arc becomes dangerous when it appears in an unexpected place of an electrical circuit, such as degraded cables and connections.
In these places, it can ignite nearby materials quickly, especially electrical insulators.

Below are some of the more detailed reasons for a arc fault to develop:

• Trapped and / or crushed cables
• Rodent damage
• Pierced installation
• Damaged insulation
• Looe terminals
• Deteriorating insulation

Released for: Schneider Electric Ireland