Is this sample size rational valid for reusable capital equipment?

Can I divide number of trials or samples into multiple devices?

"Using the Binomial distribution to calculate the sample size at 95% confidence the probability to detect no more than zero defect present out of 95% of the population would require at-least 59 number of trials or samples. Since the device is reusable capital equipment the number of trials will be divided into three devices where each device will perform 20 trials with total of 60 trials. This will discover any inherit risk present in the device. The device gets 100% functionally tested during manufacturing."