Almost 16,000 homes were today left without power after three engines at Belco tripped.A Belco spokeswoman said: "At 11.59am, load was shed from Belco's system when three engines tripped. Efforts are underway to restore power to approximately 15,800 customers who have been affected across the Island. The cause is under investigation."Customers are advised to call 955 only if they see that their neighbours' power has been restored, but theirs has not."Also, customers are advised to unplug small appliances, lamps and electronic equipment (especially those that are not plugged into surge protectors), until power is restored to avoid potential damage."Belco thanks customers for their patience, as we work to restore power as quickly as possible."By about 2.15pm the three engines were returned to service and restoration of power to all homes was almost complete, with the exception of approximately 100 customers in the White Hill area.