PART 11Lighting (continued)
Measurements of Average Levels of Lighting
153 (1) For the purposes of this Part, the average level of lighting in an area must be determined by taking four or more measurements at different places in the area at the levels set out below and by dividing the total of the results of the measurements by the number of measurements:
(2) If the average level of lighting is measured in a dry provision storage room, it must be measured when the room is empty.
(3) The lighting level measurements must be carried out by a qualified person.
Emergency Lighting System
(a) operates automatically in the event of a failure of the lighting system or if the regular power supply is interrupted;
(b) provides a level of lighting of 50 lx; and
(c) is inspected, tested and maintained to the prescribed requirements set out in one of the following regulations:
(2) Subsection (1) does not apply in respect of the deck or cargo space of a vessel.
Levels of Lighting
(2) The average level of lighting in a work area set out in column 1 of the table to this subsection must not be less than the level set out in column 2.
Average Levels of Lighting on Vessels
Column 1 Column 2 Item Work Area Average Level in lx 1 Office (a) General 200 (b) At the surface of desks 500 2 Dry Provision Storage Area 100 3 Workshops (a) General 300 (b) At the bench in an area in which medium or fine bench work or machine work is performed 500 4 Service Space — at the head of every stairway, ladder and hatchway 200 5 Galleys (a) General 300 (b) At working position 1000 6 Crew Accommodation 200 7 Sanitary Facilities (a) General 100 (b) At mirror 200 8 Dining Area and Recreational Facilities (a) General 100 (b) At the surface of tables and desks 200 9 Boiler Rooms 200 10 Engine Rooms (a) General 200 (b) At control stations, switchboards and control boards 300 11 Generator Rooms 200
Working, Walking and Climbing Areas
156 Unless otherwise specified, all working, walking and climbing areas must be illuminated to
Visual Display Terminals
(2) Reflection glare on a VDT screen must be reduced to the point where an employee at a task position is able to read every portion of any text displayed on the screen and see every portion of the visual display on the screen.
(3) If VDT work requires the reading of a document, supplementary lighting must be provided where necessary to give a level of lighting of at least 500 lx on the document.
PART 12Prevention of Noise and Vibration
158 The following provisions do not apply in respect of vessels constructed before the day on which the MLC 2006 comes into force in Canada:
159 The following definitions apply in this Part.
- A-weighted sound pressure level
A-weighted sound pressure level means a sound pressure level as determined by a measurement system which includes an A-weighting filter that meets the requirements set out in the International Electrotechnical Commission International Standard IEC 61672-1:2002(E), 1st edition 2002-2005 Electroacoustics – Sound Level Meters. (niveau de pression acoustique pondérée A)
dBA means decibel A-weighted and is a unit of A-weighted sound pressure level. (dBA)
- noise exposure level (Lex,8)
noise exposure level (Lex,8) means 10 times the logarithm to the base 10 of the time integral over any 24-hour period of a squared A-weighted sound pressure divided by 8, the reference sound pressure being 20 µPa. (niveau d’exposition (Lex,8))
- sound level meter
sound level meter means an instrument for measuring levels of sound and impulse sound that meets the standards set out in CSA Standard CAN/CSA-Z107.56-06, Procedures for the Measurement of Occupational Noise Exposure. (sonomètre)
- sound pressure level
sound pressure level means 20 times the logarithm to the base 10 of the ratio of the root mean square pressure of a sound to the reference sound pressure of 20 µPa, expressed in decibels. (niveau de pression acoustique)
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