You should never hang an immersion rod in a plastic bucket. The extreme heat from the rod can melt the plastic, which could cause the bucket to burst or even catch fire. Iron buckets are also a bad idea. Similarly, avoid using iron buckets. Iron is a good conductor of electricity, so there’s a high risk of an accidental shock. Instead, you should only use steel, aluminium, or special metal pots that come with a water heater stand.
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