The neutral wire color is white in USA, Canada and other countries which run a 60 Hz electrical power service. The neutral wire color is blue in countries in Europe and eâ¦lsewhere which run a 50 Hz electrical power service.
Melpomenem/iStock/Getty Images. The Holding Period Return is an investment measure that calculates the return you have received on your investment over the length of time that you have held the investment.
â¢Retention money is held as a percentage of interim payments. â¢Retention money is returned in parts after issue of taking over certificate and after expiry of defects notification period. â¢In lieu of retention as percentage of interim payments, the contractor can issue a retention guarantee as agreed by the parties.