End caps for four-pole busbars OSS 4 404991

Protection of busbar terminations in three-phase installations

Four-pole busbar end caps OSS 4 constitute an essential protective element in modern electrical installations. These compact protective caps have been specifically designed for HX³ busbars, providing effective protection against accidental contact at locations where wires are not connected.

Construction and Materials

Made from high-quality plastic, the caps are characterized by resistance to mechanical damage and dimensional stability. The gray color of the element blends perfectly with typical distribution boards and switchgear cabinets, maintaining the aesthetics of the installation. Compact dimensions 10×15×9 mm and lightweight design 26 grams enable easy installation even in tight spaces within distribution boards.

The construction material provides long-lasting resistance to environmental conditions typical of electrical installation environments. The material retains its properties across a wide operating temperature range, ensuring reliability throughout the entire service life.

Application and Compatibility

OSS 4 caps have been specifically developed for four-pole (4P) and two-pole (2P) busbars balanced across three phases. They are used in distribution systems utilizing traditional horizontal HX³ busbars, where they protect unconnected busbar "fingers" from accidental contact.

Their use is particularly important in industrial and commercial installations where service personnel safety is a priority. The caps are installed on busbar terminations that are not currently used for connecting loads, eliminating the risk of electric shock during maintenance work.

Safety and Standards

The product meets requirements for protection against direct contact in accordance with applicable electrical safety standards. As a certified Legrand brand accessory, the caps have passed rigorous quality and safety tests.

The element's construction guarantees complete isolation of metallic conductive parts, eliminating the possibility of accidental contact with live components. The mounting system ensures stable retention of the cap on the busbar throughout the entire service life of the installation.

Installation and Operation

Installing the caps requires no additional tools - the element slides directly onto the busbar termination, where it automatically assumes the protective position. The construction allows for easy removal in case of installation expansion or changes to the distribution board configuration.

The set includes 20 pieces of caps, enabling comprehensive protection of larger distribution installations utilizing multiple busbar branches.