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Live Electrical EV Circuit Protection

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2 Way Metal Enclosure c/w 40A Type A Double Pole RCBO

2 Way Metal Enclosure c/w 40A Type A Double Pole RCBO

19 In stock
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SKU: LEVB240
£29.50 £35.40
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4 way Metal Enclosure Type A 40A Double Pole RCBO and DP 100A Main Switch4 way Metal Enclosure Type A 40A Double Pole RCBO and DP 100A Main Switch

4 way Metal Enclosure Type A 40A Double Pole RCBO and DP 100A Main Switch

6 In stock
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SKU: LEVB440-MS
£31.99 £38.39
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Protection against Penetration (PEN) loss and compliance with BS 7671 (18th Edition of the IET Wiring Regulations) in electric vehicle (EV) circuit protection for car chargers in the UK is crucial for ensuring the safety of the installation. Here are some key considerations:

1. PEN Loss Protection: PEN loss protection is essential to safeguard against the loss of the Protective Earth and Neutral (PEN) conductor, which can compromise the safety of the electrical installation. In the context of EV charging installations, here are some key points to consider:

  • TN-C-S Earthing System: In the UK, the most common earthing system used is the TN-C-S system (also known as PME – Protective Multiple Earthing). In this system, the earth and neutral conductors are combined up to the service head. It’s important to ensure that this connection remains intact and properly maintained to prevent PEN loss.
  • Monitoring and Alarm: Consider implementing monitoring and alarm systems that can detect PEN loss and provide an alert in case of such an event. These systems can help ensure a timely response to any issues.
  • Installation by Competent Electricians: Ensure that the EV charging installation is carried out by qualified and competent electricians who are familiar with the requirements of BS 7671 and the specific needs of EV charging points.

2. Compliance with BS 7671: To ensure compliance with BS 7671 in EV circuit protection, follow these guidelines:

  • Use of RCBOs: As mentioned in a previous response, the use of RCBOs (Residual Current Circuit Breakers with Overcurrent Protection) is a common practice. RCBOs provide both residual current protection (RCD function) and overcurrent protection (circuit breaker function) in a single device.
  • Selection and Sizing: Select RCBOs with appropriate ratings based on the specific requirements of the EV charger, the cable, and the circuit. The ratings should ensure protection against overcurrent and provide fault protection, as per the charger’s specifications.
  • Cable Sizing: Ensure that the cable used in the installation is appropriately sized based on factors like current-carrying capacity and voltage drop, as outlined in BS 7671.
  • Protection against Faults: Ensure that the installation provides protection against earth faults (residual current protection) and overcurrent faults (circuit breaker or fuse protection) in accordance with BS 7671.
  • Testing and Certification: After installation, perform testing and inspection to verify that the installation complies with the wiring regulations. A qualified electrician should issue an Electrical Installation Certificate (EIC) or Minor Electrical Installation Works Certificate (MEIWC) to confirm compliance.
  • Labeling and Documentation: Properly label the installation to indicate the presence of RCBOs, their locations, and the purpose of the circuits. This helps with maintenance and troubleshooting.
  • Periodic Inspection: Schedule periodic inspections and testing of the installation to ensure ongoing compliance and safety.

It’s essential to work with qualified electricians and adhere to the latest edition of BS 7671 to ensure that your EV charging installation is safe and compliant with UK electrical regulations. The electricians should be familiar with the specific requirements for EV charging installations and PEN loss protection in TN-C-S systems.

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