July 31, 2013
SUMMARY OF REQUIREMENTS
The following is a brief summary of the new and revised paragraphs in the Standard for Outline Of Investigation For Audio/Video, Information And Communication Technology Equipment Cabinet, Enclosure And Rack Systems, UL 2416, Issues 2, which have a future Effective Date of May 14, 2015 and the action that may be required to determine compliance.
NOTE:
This summary does NOT include requirements that are in UL2416 but were already included in the previously referenced standards UL60950-1 and UL50E or other referenced standards that would have been routinely applied to enclosure systems.
Paragraphs / General Subject and Comment / Action that may be required to determine compliance /1.6 / Exhaust chimneys and other air management systems that connect to environmental air systems in buildings. Not covered by UL 2416. / Equipment of this type shall be investigated under the requirements in ANSI/UL 1995, "Heating and Cooling Equipment" and UL 723S, “Drop Out Ceilings Installed Beneath Sprinklers”.
4.1 / Categories of equipment:
ENCLOSURE
EQUIPMENT CABINET
RACK / Equipment needs to be categorized and identified in the certification directory (Listing Cards) as an enclosure, equipment cabinet or rack based on its construction and intended or perceived use.
6.3 / Connections for Wiring Systems
Specific requirements for knockouts, multiple knockouts, threaded openings, knockouts in plastic enclosures, etc. are now included. / These requirements are not new. However, equipment that does not use Listed electrical boxes or enclosures may need to be evaluated if requirements for knockouts, etc. were not previously considered.
6.6.3 / Clarified in Issue 2.
A strain relief that is part of a temporary power tap or other certified assembly inside the enclosure system meets the intent of this paragraph. / NA
6.10.1 / Electrical spacings shall comply with UL 508 except for spacings within already certified equipment. / Electrical circuits not part of Listed equipment may need to be evaluated for compliance with UL 508
6.10.2
6.10.3 / Overvoltage categories
Specifies which OV categories need to be considered based on anticipated enclosure system installation location. / Electrical circuits not part of Listed equipment AND Listed equipment may need to be reevaluated for the appropriate overvoltage category.
7.1.1 / Grounding
Requires that a ground lug be provided / Make sure a ground lug is provided
7.1.2
7.4 / Grounding continuity and exceptions with markings / Review grounding continuity via inspection or test. Where adequate grounding continuity may not be provided in equipment cabinets or racks added markings and instructions are required.
7.1.2 / Reference corrected in Issue 2.
The Latest 467 does not have a section 11 so it is an incorrect reference. Paragraph was reworded to take the section reference out. / NA
8.2 / Interruption of non-current carrying metallic members of optical fiber cable.
This is not common. Usually a grounding lug is provided or enclosure system is specified for use with non-metallic optical fiber cable. / An insulating joint or equivalent device used to comply with 770.93(B) of ANSI/NFPA 70 shall be rated and evaluated for the rms voltage it is intended to isolate.
9.1.3 / Enclosures for indoor locations.
It is not common for indoor enclosure systems to be provided with a NEMA rating. / If marked with an indoor NEMA rating an indoor enclosure construction must comply with UL50 or UL508.
9.1.4 / Outdoor Enclosures / Requires construction to comply with UL50 or Ul508A or be tested. Enclosure systems for outdoor use that were evaluated to UL60950-1 will need to be reviewed to determine compliance.
9.1.4.1 / Clarified in Issue 2.
The last sentence of 9.1.4.1 was revised. Environmental requirements are in Section 10 and there are other options besides UL50E. / NA
9.3 / Glass Windows / Glass windows need to be evaluated per this section.
9.5 / Large Enclosure Systems (those that can be entered by service persons). / Requirements in UL 2755-Modular Data Centers apply.
10 / Environmental Considerations
10.1 / Indoor Locations
It is not common for indoor enclosure systems to be provided with a NEMA rating. / If marked with a NEMA rating shall comply with UL50E for the rating.
10.2 / Outdoor Locations / ENCLOSURES intended for outdoor locations shall comply with the requirements in the Standard for Enclosures for Electrical Equipment, Environmental Considerations, UL 50E applicable to the enclosure type and are identified by the type designation.
EXCEPTION – for outdoor enclosure systems marked “raintight” or “rainproof” tests in UL2416 apply. See 10.2.3.
Enclosure systems that were evaluated to UL60950-22 may require additional evaluation.
10.2.1.1 Exception / Reference was corrected in Issue 2.
Exception: An ENCLOSURE may be identified as “raintight” or “rainproof” without a type designation if it complies with the requirements of 10.2.3.. / NA
10.2.3.2 / Reference was corrected in Issue 2.
A gasket used to make an ENCLOSURE raintight or rainproof shall be tested as specified in 10.2.5. / NA
10.2.5 / Requirements for gaskets and seals / Non-certified Gaskets and seals may need to be evaluated if not tested previously.
11.1 / Loading
Some enclosure systems have very large load ratings (>500 lbs or even >1000 lbs). Weights and special handling apparatus may be required. / Enclosure systems and load bearing structural assemblies like shelves, brackets, etc. are required to be tested to make sure they can safely handle their rated loads. Reports and test records will need to be reviewed to make sure load ratings are provided and testing performed.
11.1.6
11.1.7 / Static Load Tests I and II (Alternative Tests – not commonly used)
These tests are from the telecom industry. Testing can be performed by the UL RTP NEBS lab. Contact Michelle Henderson, 919 549 1471, .
Other test set-ups are possible. / NA
11.1.6.4 / CLARIFICATION:
The force is a horizontal force applied as close to the top as possible. It is not a vertical force applied to the top.
11.1.6.4 will be reworded to clarify this. / NA
11.1.8 / Dynamic Test (Alternative Test – not commonly used)
This is a seismic test from the telecom industry. Testing can be performed by the UL RTP NEBS lab. Contact Michelle Henderson, 919 549 1471, . / NA
11.4 / Dynamic Load Rating
NOTE: This is NOT the same as the dynamic test of 11.1.8 which is a seismic test used to evaluate the overall load handling capacity of the enclosure system.
UL1667 staff should be able to run this test and do the calculations. / Equipment with wheels or casters that is intended to be moved around needs to be evaluated.
11.7 / Safety strap attachment – pole mounted/aerial equipment
Some climbing gear and weights are required for this test.
This is not a common construction. / New requirement for UL standards. Applies to pole and aerial enclosures that have a safety strap attachment.
NOTE: Does not REQUIRE them to have a safety strap attachment but if it has one it must be tested.
11.8 / Clarified in Issue 2.
Securement of products. This should apply only to equipment intended to be mobile or with a dynamic load rating. / New requirement for UL2416 and will require evaluation of some equipment shelves.
11.9 / Stability / Equipment that was not tested, was tested unloaded or not tested with a disadvantageous load distribution may need to be evaluated. Manufacturer’s instructions for loading and load distribution are to be taken into account.
12.1.2 / Non-metallic covers and doors for ENCLOSURES and EQUIPMENT CABINETS / User installed equipment is unknown so these are required to be 5V. If these were previously viewed as “decorative” with an HB, V1, V2 or V0 rating, additional evaluation will be required.
HB is only permitted if it is on the outside of other suitable enclosure material that is part of the enclosure system. It is not permitted to rely on user installed equipment enclosures.
12.1.5 / Corrected in Issue 2.
Materials used in an enclosure system with a bottom enclosure or internal barriers or baffles complying with 4.6.2 of the Standard for Information Technology Equipment – Safety – Part 1: General Requirements (7.1.4, 9.1.3.1, 12.1.1,UL60950-1, shall comply with 4.7.3.4 of UL60950-1, “Materials for components and other parts inside fire enclosures”. Enclosure systems without such a bottom enclosure or intermediate baffle shall have minimum V-1 materials for internal parts.
Editorial error… clause references don’t belong in this paragraph. / NA – Identifying an editorial error only.
12.1.8 / Clarification in Issue 2.
Cable management systems provided as part of an enclosure system shall comply with at least one of the flammability requirements or tests in UL 5C Surface Raceways and Fittings for Use with Data, Signal, and Control Circuits, or UL 2024 Signaling, Optical Fiber and Communications Raceways and Cable Routing Assemblies. This requirement applies whether the cable management system is located inside or outside of an ENCLOSURE, an EQUIPMENT CABINET or a RACK. / The circuits involved with user installed cabling is unknown so these are required to be flame rated. UL2416 is written around the assumption that components and subassemblies are evaluated to the appropriate requirements for the part in question.
UL5C requires a V1 or V0 material rating or a 3/4 inch nominal (20 ±1 mm) yellow-tipped blue flame. Test.
UL 2024 has larger scale flame tests for plenum, riser, etc. applications.
An evaluation of the cable management system will be required for compliance with this requirement. If these were previously viewed as “decorative” and unrated or rated HB or V2, additional testing will be required.
Note that this does not require certification to these standards, only that the material complies with the flame tests. Non-certified materials may require additional traceability verification during surveillance (follow-up).
12.3.2 / Equipment for ITE rooms
Since this category covers ITE, AV, telecom etc. equipment, enclosure systems meeting the requirements for ITE rooms (see 12.3.1) should be identified as such. / If enclosure systems are intended for ITE rooms they should be evaluated per 12.3.1 and marked in accordance with 12.3.2.
12.4 / Enclosure systems intended to be installed in air-handling spaces
In addition to materials requirements there are new requirements for number and size of openings. / Equipment for use in air handling spaces should already be metal or evaluated to UL 2043 as required by UL60950-1. If there are openings in the enclosure, further evaluation will be required.
12.4.3.1 / Corrected in Issue 2.
To properly align with the terminology used in the NEC the required marking should read:
“Suitable for installation in Other Spaces Used for Environmental Air (Plenums)”
The reference to the NEC paragraph should NOT be included. / The marking on products intended for installation in dropped ceilings and Other Spaces Used for Environmental Air (Plenums) needs to be reviewed.
12.5 / In-wall mounted enclosure systems
New requirements for materials and openings / Enclosures intended for in-wall mounting will require evaluation to these requirements.
12.6 / Fire stop requirements
New requirements for ONUs, NIDs etc. that may be wall mounted to a building or similar structure and wired with unlisted outside plant cables. / Non-metallic enclosures of such equipment not rated 5VA may require additional evaluation.
12.6.1 / Clarified in Issue 2.
This does not apply to network equipment mounted on poles or aerial strands. It is intended for wall mounted equipment to prevent fire from propagating to a building or similar structure. / NA
12.6.1(d)
12.6.2 / Cable Burn/Fire Stop Test
This test is from UL514B, Conduit, Tubing, and Cable Fittings, Clauses 5.2.1.1 and 8.2.
Contact the PDE David Gerstetter, 847 664 1733, . / This is not a common test as most telecom enclosures of this type are metal or 5VA
12.6.1(e) / This testing can be performed by UL Northbrook’s fire group. Contact Dan Bogdan 847-664-1229, . / For information only.
This is not a common test as most telecom enclosures of this type are metal or 5VA.
13.5.2 / Enclosure venting (for batteries) / Enclosure venting is required for a broader range of battery types and technologies than may have been previously evaluated. For example, valve regulated batteries are not exempt.
13.6 / Heaters and temperature controls / Compliance determined by inspection. Only applies to outdoor equipment with heated battery compartments.
16.1.6 / Configuration Marking / This has always been an NWIN requirement but may not have been applied uniformly. It is critical that what is included in the certification of the enclosure system be identified.
16.1.7 / Cabinet only marking
If no support equipment is included in the enclosure system it must be made clear that the certification only covers the cabinet. / It is possible that since the requirement has been to identify equipment that is provided with an enclosure system that empty systems were not marked at all. It must be made clear that the certification only covers the cabinet.
16.3 / Ratings / Even if the enclosure system only includes a temporary power tap it requires an electrical rating.