How to secure a large power cord to a piece of equipment?

Two turns of electrical tape & it’s nice & tight. I also cut a small wood block & put it under the connector for good measure.

Thanks everyone for your help! Nice to be a part of a forum that actually works. 

Thanks everyone for your thoughts. The same power cord fits very tightly into my Innuos server. I have it propped up just a bit w/ a wood block but I will also try a few turns wrapped around the connector w/ the self fusing tape too.