1. A method of detecting arcing between two electrical conductors, the method including: generating an image of the electrical conductors; and with a processor: determining a region of interest in the image where arcing between the electrical conductors is likely to occur; isolating the region of interest; processing arcing candidates captured in the image and falling within the region of interest to screen the arcing candidates to reject an arcing candidate likely to have been caused by factors other than arcing as a false positive, the arcing candidate being rejected if it is determined: that a number of image components of the image, having a predetermined characteristic in a first sub-region of the image is below a pre-defined threshold, and that if a number of image components of the image, having the same characteristic, is present in a second sub-region of the image, then the number of image components having the characteristic in the second sub-region of the image either exceeds the pre-defined threshold or exceeds the number of image components in the first sub-region having the characteristic; and validating that a selected arcing candidate is an arc by further processing the selected arcing candidate.