No this guy linked out the WHOLE of the hardware E-Stop circuit.
He was the so called competent contractor who installed the equipment, it had never worked correctly from day 1!
There are a hundred other issues with the kit, but this one is probably the worst.
It nearly killed a guy, admittedly the "victim" should have undertaken his LOTO, but, the machinery was fundamentally incorrectly wired, and was not in accordance with the manufacturers drawings.
I have put production lines on stop before now in a 24/7/365 automotive environment because I would not bypass a safety limit and leave site.
Customer rules meant I had to leave site and there was no one to replace me to monitor the kit.
They did not like it, but my employer backed me up 100% as did the customer Snr Mgt in the morning!
Linking out safety circuits is a NO NO, unless it is to prove the fault under controlled conditions, and the link is removed once the point is proven.