Frequently Asked Questions
Earth Leakage
The wiring standards indicate that earth leakage units should trip strictly between 15 – 30 mA. As a quality manufacturer, CBI maintains a stringent safety margin from these limits, i.e. it will be a few milliamps less than 30 mA. Under normal circumstances, a leakage current is already present in most systems. Therefore when testing an installation and it trips well below 30 mA on your tester, that indicates that there could already be some leakage in the system.
Unless stated otherwise, CBI QF/SFM RCBOs cannot be reverse fed. Some RCBOs from the SFR range can be reverse fed.
Yes, all QF/SFM/SFR CBI earth leakage products comply with Australian standards. The QF/SFM, earth leakage products, comply with AS/NZS 3190 and the SFR earth leakage products comply with AS/NZS 61008 & AS/NZS 61009.
Yes, the QF and the SFR earth leakage products are listed on the EESS database, as these products are marked/marketed for residential applications. The SFM range is only marked/marketed for commercial/industrial applications and therefore is excluded (refer to the In-scope electrical equipment definitions and risk levels for the Electrical Equipment Safety System V2.0 PDF).
No, earth leakage products tested and certified to different standards will have different maximum actuating and non-actuating times.
To find the applicable break times for a particular CBI earth leakage product, please refer to the front printing on the earth leakage product.
The QF/SFM, earth leakage products, comply with AS/NZS 3190 and the SFR earth leakage products comply with AS/NZS 61008 & AS/NZS 61009.
