Buck Booster Size Guide

This formula will determine which size buck booster you need for your tanning bed. We strongly urge you to have an electrician help you with the tanning bed buck booster. Spas and More is not responsibile for any accidents or wrong information obtained from using this formula. Tanning bed buck boosters are non returnable but are covered by the manufacturers warranty.

First determine the kva rating of the tanning bed. To do this find the tanning bed manufacturers label on the back or side of your tanning bedbed. It should have an amp ( A ) rating listed. Take the ( A ) amp and multiply it by the ( V ) voltage listed on the bed label. Divide this number by 1000. This number is the kva rating for the tanning bed. Next take a voltage reading with a digital volt meter of the line or wall voltage where the tanning bed is to be installed. This is called the high voltage in the equation below. Next subtract the tanning bed voltage (the V # on the bed label ) from the high voltage. Take that number and divide it by the high voltage. Multiply this number by the kva and the result is the size of tanning bed buck booster you need. Always round up to the next highest size rather than down. See the example below.

Bed label says 220 V and 20 A
The line voltage is measured and determined to be 242 V.
The kva is A x V /1000 = kva so 220 x 20 = 4400 divided by 1000=4.4 kva
Next high voltage minus low voltage is 242-220= 22 divided by high voltage =0.0909
Take the .0909 x 4.4 ( kva ) =.39996
We round this number up to .5 so a .5 kva buck booster would be correct for the bed.

High voltage is the voltage at the wall
Low voltage is the bed voltage from the label on the bed
A= amps from label on bed
V= volts from label on bed
kva=A multplied by V, divided by 1000

This is a general sizing rule:
20 Amp beds will use a .5 kva tanning bed buck booster
30 Amp beds will use the 1.0 kva tanning bed buck booster