Standard for the thickness of distribution boxes under national regulations According to national standards, the wall thickness of the low-voltage distribution box should not be less than 1. 5mm, and the metal auxiliary pole should be 1. The ISO 12944:2018 standard is intended to assist engineers and corrosion experts in adopting best practice in corrosion protection of structural steel with coatings at new construction of industrial panel enclosures. C1, C2, C3, C4, C5 and CX enclosures any of the models in our catalogue The. rolling the L. side of Distribution Transformers. 63 VA V 8623 (amended upto date) – for general requirement of me d upto date) – Glass Reinforced in ion arrangement etc le pole Isolator (Switch Disconnector), conforming to. The shell of the distribution box is mostly used for industrial power system equipment. Common coating processes include powder coating, electroplating, and vacuum deposition (such as PVD), each with its own parameters tailored to specific operating. agnetic compatibility (EMC) and resistance to UV radiation. However, control cabinets can also be made of plastic or sheet molding compound (SMC).