UL 48:2011 pdf download.Electric Signs.
3.2 Reference publications
3.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard.
3.3 Units of measurement
3.3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.
3.3.2 Unless otherwise indicated, all voltage and current values mentioned in this Standard are AC root-mean-square (rms).
4 Con struclion
4.1 Mechanical
41.1 General
4.1.1,1 A sàgn shall be constructed in accordance with the requirements 0(4.1 to have the strength and rigidity required to resist the environment to which it is subjected.
4.1.1.2 Parts of a sign that are only decorative in nature and do not affect the integrity of the sign need not comply wIth 4.1.
4.1.1.3 All parts. subassemblies, and components shall be secured to prevent loosening, unintended rotation, or turning. etc.
4.1.1.4 Moving parts of a sign or associated equipment, accessible during intended operation or user maintenance, as determined by the articulate probe in Figure 4,3. and that present a nsk of injury to persons must be adequately guarded or protected to prevent contact by user or operator. See 4.4.2 for accessility requirements.
4.1.1,5 An edge subject to contact by wiring or other electrical components shall not be sufficiently sharp to abrade, cut, or otherwise damage electrical insulation.
4.1.1.6 An edge subject to contact by persons during normal operation or maintenance shall not be sufficiently sharp to constitute a risk of injury.
4.1.1.7 Signs not constructed in accordance with the minimum thermal spacing requirements of 4.2.3.2 shall comply with the Temperature Test Requirements in 5.2.
3.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard.
3.3 Units of measurement
3.3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.
3.3.2 Unless otherwise indicated, all voltage and current values mentioned in this Standard are AC root-mean-square (rms).
4 Con struclion
4.1 Mechanical
41.1 General
4.1.1,1 A sàgn shall be constructed in accordance with the requirements 0(4.1 to have the strength and rigidity required to resist the environment to which it is subjected.
4.1.1.2 Parts of a sign that are only decorative in nature and do not affect the integrity of the sign need not comply wIth 4.1.
4.1.1.3 All parts. subassemblies, and components shall be secured to prevent loosening, unintended rotation, or turning. etc.
4.1.1.4 Moving parts of a sign or associated equipment, accessible during intended operation or user maintenance, as determined by the articulate probe in Figure 4,3. and that present a nsk of injury to persons must be adequately guarded or protected to prevent contact by user or operator. See 4.4.2 for accessility requirements.
4.1.1,5 An edge subject to contact by wiring or other electrical components shall not be sufficiently sharp to abrade, cut, or otherwise damage electrical insulation.
4.1.1.6 An edge subject to contact by persons during normal operation or maintenance shall not be sufficiently sharp to constitute a risk of injury.
4.1.1.7 Signs not constructed in accordance with the minimum thermal spacing requirements of 4.2.3.2 shall comply with the Temperature Test Requirements in 5.2.
