Cable sizes are not always what they seem. Yeterday, before swapping out the cable, i measured what I had previously used and confirmed that cheap budget brands are straight-up smaller than advertised! For example, if you buy standard 2.5mm² cable: Premium brands: Measure around 1.78mm in conductor diameter (the correct math for 2.5mm² area). BCC and Yazaki Cheap brands: Often measure down to 1.4mm in diameter (which is actually closer to 1.5mm² area!). Undersized copper means higher resistance, dangerous voltage drops, and a serious fire risk under heavy loads. Don't risk your safety, grab your digital calipers and verify your copper before installing it!
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