Can I use 240 volt electrical equipments into 220 volt? Should I need a transformer?
No, you don't need a step down transformer. It's the same with the standard 115 volt wall outlet. if you use a voltmeter to read a standard wall outlet, very rarely will it be precisely 115 volt. Normally you get readings of between 110 volt to 120 volt. In North America we use 2 phase 240 volt (splits to form 2x 120 volt @ 60Hz) In most of Europe use 1 phase 240 @ 50 Hz. So if you're planning to use a European piece of equipment (single phase, 240 volt, 50 Hz) on North American (two phase, 240 volt, 60 Hz[x2]), don't because you'll risk damaging your equipment.
no you shouldn't need a transformer. Funny I had a guy just the other day that bought a tanning bed and it stated it needed 240vac.he wanted me to hook up a outlet in his garage and I wasn't sure because of the specs. I called the manufacturer and they assured me that I could use 220vac from the house. Not sure why they state it this waybut I assume its the same as when they say 100v and 120v just semantics
no, 220/240 is within tolerances