Spark arresters

2.6.3.3. (1) Spark arresters installed in conformance with Article 2.6.3.1. shall be inspected and cleaned at intervals not greater than 12 months or more frequently where accumulations of debris will adversely affect operations.

(2) Burnt-out spark arresters shall be repaired or replaced

2.6.4.1. Electrical equipment vaults shall not be used for storage purposes.

2.6.4.2. Electrical equipment vaults shall be kept locked so that unauthorized persons will not have access to them.

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