Oman Power Distribution Box Configuration Table

Oman power distribution boxes are configured according to Omani Electrical Standards and the Distribution Code, specifying voltage levels, circuit types, protection devices, and layout requirements.

Key Configuration Guidelines

Voltage Levels and Circuits

• Low-voltage distribution boxes typically operate at 400/230V three-phase systems for commercial and industrial applications .
• Circuits are divided into main feeders, sub-feeders, and branch circuits, with clear labeling for each load type.
• Each distribution box must accommodate metering equipment, power factor correction devices, and switchgear as required by the building or facility . Protection Devices
• Circuit breakers and miniature circuit breakers (MCBs) are used for overload and short-circuit protection .
• Fuses may be installed for additional protection of transformers or sensitive equipment .
• Selectivity and coordination between upstream and downstream protection devices are required to ensure system reliability . Physical Layout and Access
• Minimum equipment loading area: 2500mm x 2500mm to allow safe installation and maintenance .
• Doors must be located on an outside wall with controlled access using a Network Operator's standard lock .
• Adequate space must be provided for cable entry and exit, ensuring unimpeded access for maintenance . Standards and Compliance
• All distribution boxes must comply with the Oman Electrical Standard for indoor substations and the Distribution Code, which governs connection, operation, and maintenance of distribution systems .
• Customers are responsible for ensuring that substation construction is coordinated with civil authorities and building plans .
• Any deviations from standard configurations require approval through the Document Owner or Regulatory Authority . Example Configuration Table (Illustrative)

This table is indicative; actual configurations must follow the site-specific design and Omani regulatory requirements. For detailed design, refer to the Oman Electrical Standard for Indoor Substations and Petroleum Development Oman SP-1103 Electrical Engineering Design Specification .