Applications in the pulp and paper industry make special demands on the ability of cables to withstand high temperatures, attack by caustic chemicals, and exposure to fire. Measurement of these capabilities is already encompassed in recognized tests and testing procedures. A great many tests are now prescribed, covering the mechanical and physical??as well as electrical??performance of cables. Generally speaking, these tests can be carried out properly only with the facilities and controlled environment of a laboratory. In-service testing remains a difficult task and presents certain risks and problems. The testing facilities of a modern plant for the manufacture of electrical cables are described.