joshgarcia
Member
The power plant I work at has been in operation for around 50 yrs. We have two battery vaults that provide 250 vdc to high voltage MCC's for controls. The old vault has the charger/rectifier and disconnect located in the vault along with the batteries while the newer vault, which appears to be around 5 yrs. old, has the charger/rectifier and disconnect located outside the vault and has HVAC ventilation while the old vault is so so on ventilation. I am unable to locate in the NEC where I should relocate the charger/rectifier and disconnect outside the vault to match the newer vault. Both vaults contain the same batteries and I believe they are in the process of adding exhaust fans to the old vault. Any information on this issue is appreciated.