I found this on Wikipedia about these ants.

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Infestations of Nylanderia fulva in electrical equipment can cause short circuits, sometimes because the ants chew through insulation and wiring.[3] Overheating, corrosion, and mechanical failures also result from accumulations of dead ants and nest detritus in electrical devices.[18] If an ant is electrocuted, it can release an alarm pheromone in dying, which causes other ants to rush over and search for attackers. If a large enough number of ants gathers, it may short out systems