Interpret CEC Rules and Regulations Concerning HV Installations

Question 1

What are three different locations where it is necessary to place a “DANGER - HIGH VOLTAGE” warning?

Answer 1

• On all HV conduits and cables at points of access to conductors
• On all cable trays containing HV conductors
• On exposed portions of all HV cables
• At electrical equipment vaults (rooms, areas or enclosures)

See CEC Rule 36-006

Question 2

Which table in the CEC lists the radii of bends for HV cables?

Answer 2

Table 15. CEC Rule 36-102

Question 3

What is the minimum vertical ground clearance for 15kV open-line conductors?

Answer 3

6.1m. See Table 34

Question 4

Is it permissible to install HV cables in elevator shafts?

Answer 4

No. See CEC Rule 36-116

Question 5

Which table in the CEC lists the minimum size of bare copper conductor for grounding purposes in HV installations?

Answer 5

Table 51. See CEC Rule 36-300

Question 6

Under a fault condition, the maximum voltage rise on all parts of the station ground grid should not exceed _____

Answer 6

5000V. See CEC Rule 36-304

Question 7

Which table in the CEC lists the maximum tolerable touch and step voltages for HV installations?

Answer 7

Table 52