Electrical receptacles for my work table

[Frank S]

Actually Carl in the USA with our silly split phase For our 240 & 120v circuits many still call them 220 & 110v, no matter the voltage term the circuits are still the same.
for 240v there are 2 hot lines and a ground, sometimes with the neutral as well. for 120v it is 1 line the neutral and the ground any 240v equipment which utilizes 120v controls will additionally have the neutral. The neutral wire should be bonded to ground only at the main panel this creates a direct return pathway for the current to the panel should there ever be a short circuit. Some districts will allow the metal conduit to serve as the ground. I never rely on this, and always pull a green wire from the panel through the conduit to whatever the terminus of the circuit may be. Additionally, if I am going to add 120v receptacles by taping 1 or the other of the 2 hot lines from the 240v circuit I pull a separate white (neutral wire) for that circuit. Now here is the problem with splitting a 120v circuit from and existing 240v circuit the breaker for the 240v is designed for both lines and if there is a fault it disconnects both. All of mine are from 40 to 70-amp breakers hardly suited to split a 120v circuit off of them, meaning should I decide to pull a 120v circuit from one of those I would need to include a micro panel with a single 15- or 20-amp breaker, between where I tapped into the larger circuit and the 120v receptacles.
In answer to Meyer77's question is there a safe way of doing this YES, can it be done to code? That depends on who wrote the code and how they interpret it.
When in doubt always pull a couple wires and make the circuit completely separate There is no problem having both in the same conduit as long as you do not go over a 50% fill. Where you can get yourself in trouble is when trying to run 3 ph in the same conduit as single or split phase. Large raceways and cable trays being the exception to this, in some cases.
Disclaimer: No, I am not an electrical engineer nor a licensed electrician. So, any of my advice is to be taken for what it is worth, always consult a licensed electrician local to your area before attempting to make any changes in your home or shop wiring. I have always done all of my own wiring in my houses, and my shops including 3 phase, and have worked with higher voltages in the 600v range including 10,000amp 1200V DC