Why your Pod Point Homecharger doesn't require an Earth Rod
Posted August 26, 2019 by James
All Pod Point Solo hardware contains a proprietary patent pending technology that allows direct connection to a PME supply.
This is achieved by continuously monitoring the status of L, N and E. In the event that these fall outside of “normal” conditions, e.g. If the voltage between N and L falls outside a value that could be the result of a failing Neutral / Earth conductor the charge cycle is ended. As a function of this detection system the Pod Point hardware incorporates relays that disconnect L, N and E to the vehicle ensuring touch voltage is not dangerous. This “safe” state is also true when the EV is not charging.
The system is also able to protect for other potentially dangerous abnormalities, for example if a TT connected electrode were to have an excessive touch voltage due to an external fault.
The Pod Point hardware using this technology is being used to satisfy this requirement should be noted in the departures section of the installation certificate issued by the installer, example statement below:
“This pod-point EVCP includes a proprietary patent pending system that isolates PEN if a fault is detected, No rod is required as it provides at least the level of protection as BS7671:2018 722.411.4.1: (iii)”.
6mA DC Leakage Protection
All Pod Point hardware contains a dedicated sensor that identifies any DC leakage. In the event that DC leakage equal to or exceeding 6mA is detected the Pod Point ends the charge cycle and opens relays that disconnect L, N and E to the vehicle. This feature allows the Pod Point to be installed using a Type A RCD / RCBO.
That Pod Point hardware using this technology is being used should be noted in the comments section of the installation certificate issued by the installer, example statement below:
“This Pod Point EVCP includes a 6mA DC protection device, in accordance with regulation 722.531.2.101.”
For more information, view our previous article which includes a full technical document.