I always remind my students to if an SI unit is named after a person (Watt, Ampere, Faraday) etc, then the corresponding symbol is upper case. Otherwise it is lower case. An exception is made for litres - the CGPM have agreed that either "L" or "l" can be used, the reason being that "l" and "1" aer easily confused.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Pierre Abbat Sent: 10 May 2008 12:13 To: U.S. Metric Association Subject: [USMA:40880] Re: SI power questions and a lot of random thoughts :) ... snip True, but the symbol for ampere is A, not a. The hour isn't metric, but it is allowed to be used with SI. ... snip Yes. Again "W" is always capitalized when it refers to watts. ... snip Pierre
