---
title: Bender NGR Solutions Ensure Compliance with New CE Code Section 10 Impedance Grounded Systems
description: The 2021 CE Code was published in January 2021 and will be enacted or adopted in the various provincial and territorial jurisdictions on their schedules.
---

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# [Bender NGR Solutions Ensure Compliance with New CE Code Section 10 Impedance Grounded Systems](https://la-blog.bender-group.com/es/bender-ngr-solutions-ensure-compliance-with-new-ce-code-section-10-impedance-grounded-systems-0)

 Escrito por [Bender Inc](https://la-blog.bender-group.com/es/author/bender-inc) | Feb 11, 2022, 1:37:49 PM

The 2018 Canadian Electrical Code included a complete Section 10 Grounding and Bonding re-write which included new requirements for impedance-grounded systems in Rule 10-302. Immediate tripping was newly required when the impedance-grounded system experienced an open or short impedance-grounding device.

The [2021 CE Code](https://www.csagroup.org/store/product/CSA%20C22.1%3A21/?msclkid=798043fb795f1909cfa723ef5758a96e&utm_source=bing&utm_medium=cpc&utm_campaign=STDS%20-%20EN%20%7C%20TopSell%20%7C%20CE%20Code%20(CAN)&utm_term=%2BCanadian%20%2Belectrical%20%2Bcode%202021&utm_content=C22.1-21) was published in January 2021 and will be enacted or adopted in the various provincial and territorial jurisdictions on their schedules. In this edition, impedance-grounded system performance requirements are more nuanced. Most impedance-grounded electrical systems are impedance grounded through a neutral-grounding resistor (NGR), and the balance of this paper will use NGR terminology. There is no longer a blanket immediate trip-on-resistor-failure requirement.

Three impedance-grounded-system failure modes are described:

- A ground fault on current-carrying conductors
- A ground fault on the conductor connecting the NGR to the source (shorted NGR)
- A loss of continuity between the source and ground (open NGR, including connections to neutral and ground).

##### What are the requirements?

- Four-wire systems (those with a distributed neutral) must immediately trip on any of the failure modes.
- Three-wire systems are defined as one of two types—5 kV or less with ground-fault current limited to 10 A or less, and everything else. The ground-fault protection provided by the NGR monitor is defined as one of two types—those that can detect a ground fault with the NGR open and those that cannot.
- An up to 5-kV, up to 10-A three-wire system experiencing a phase-to-ground fault must trip within the NGR’s time rating. (If it is continuous, no trip is required.)
- Three-wire systems over 5 kV or 10 A experiencing a phase-to-ground fault must trip within the NGR’ time rating, not to exceed 48 hours.
- Three-wire impedance-grounded systems experiencing a shorted NGR must alarm and trip within 48 hours.
- Three-wire impedance-grounded systems experiencing an open NGR, in which a ground fault is still detectable, must alarm—no de-energization is required. If a ground fault is not observable, it must alarm and trip within 48 hours.

The requirements can be expressed graphically as a decision tree:

[Ver post completo](https://la-blog.bender-group.com/es/bender-ngr-solutions-ensure-compliance-with-new-ce-code-section-10-impedance-grounded-systems-0)

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