As you might be aware BambuLab issued a recall for the BambuLab A1 3d-printer. In particular, the issue is the mains-voltage (230V AC) heat bed cable.
As a resolution, they offer two solutions:
- Ship the entire printer back to them and receive a replacement printer.
- They mail a new cable and you install it.
What BambuLab doesn’t mention at all is the test according to EN 50678 (Verification of the effectiveness of protective measures of electrical equipment after repair). Unless you can perform this test I would recommend choosing the printer replacement.
I’m certainly not trying to vouch for the safety of Bambu’s designs and am only coming at this from owning/building a 350mm^3 Voron 2.4 that uses mains voltage to heat its 8 pound 355mm x 355mm x 8mm bed. Granted, my 2.4 has a fixed bed and the A1 doesn’t.