I reckon you mean water cooled tig torch leads? (got to have at least three lines to braid anything).    If you run them inside a cover I would not, just makes it easier to fix em.  If they are just out there yes I use to braid them cause it prevented getting snagged on stuff better then just zip ties.  You will lose a bit of length and it always seems you end up with extra at the end....braid kinda loosely, don't over do it and you still need a zip tie say every 2 ft or so.  It is far better though to put them in a leather cover, extra weight yes but you will find you will be replacing the lines a lot less due to snags and burns.