What protection level must Class 1 Power Sources have from overcurrent devices?

Class 1 Power Sources are designed to supply power in a way that minimizes the risk of electric shock in low voltage communication systems. The correct protection level from overcurrent devices for Class 1 Power Sources must be set at 167% of the rated output current.

This level of protection is established to ensure that in the event of a fault condition, the overcurrent device will trip or open the circuit before the current exceeds a level that could cause harm or lead to potentially dangerous overheating of the wiring or connected equipment. By setting the protection level at 167%, it accommodates situations where momentary inrush currents might occur while still safeguarding the circuit from sustained overload conditions that could lead to fire hazards or equipment damage.

This value is derived from industry standards and safety practices intended to maintain the integrity and safety of low voltage installation practices, ensuring that these systems operate reliably while mitigating risk.