You can search the Institute of Electrical and Electronics Engineers (IEEE) Web site for specific information on the 10Base-T specification, encompassed in the IEEE 802.3 spec.
Alternatively, you can refer to the vendor of your Ethernet hardware for specifications relevant to the hardware you are installing. If you have not yet purchased equipment, use your favorite Internet search engine to search the web. "Ethernet wiring" would be a good search query to start with.
Institute of Electrical and Electronics Engineers (IEEE) Web site:
http://www.ieee.org/