BobK,
Thanks for the input. My project is for personnel use at my own home.
The project I have built at this time uses the 16f88, ds1307 (with battery), 24lc256, rs232, ibutton reader and a relay to activate the electric strike. I communicate with the pic using a program I have put together in Delphi.
I would like to build another reader that is networked removing the eeprom, ds1307 and other hardware. I will be using an old pc as the master to keep track of id's and activity.

I am the facilities supervisor for the city I live in and am very in tune to the local building codes.
My department is responsible for all forms of facility maintenance and construction. Everything is done following all federal, state and local building codes. Everything we do when warranted is done by permit giving our local authorities i.e. building, fire and risk management agencies an opertunity to review all submitted material. When hiring contractors they are required to have liscenses (contractor and business) with all insurance coverages in place. All products they supply will meet our specs or they don's step foot on the property.

Your reply is well taken and I believe one that all developers should consider! Just because we build it does not make it rated for use in residential or commercial applications!