10. 0000050759 00000 n %PDF-1.4 % Generally, a transformer located near a building requires 4ft clearance from the building vertical surfaces, assuming no windows from grade to 18ft. trailer Clearances and depths required by these rules shall be deemed impracticable only to the extent that existing structures or natural obstructions require a reduction in such clearances or depths in the immediate vicinity of such obstruction; or in those exceptional cases where the clearance otherwise required would, in particular and limited . Learn more about the AGE Initiative and view the AIM below: The following landscaping brochures have been created to provide SCE customers with information and guidelines to aesthetically screen pad-mounted transformers and other distribution pad-mounted equipment in non-SCE facilities. duplex transformers set on a single pad are an exception d. a minimum 72-inch x 72-inch x 72-inch clear working space //-->Oa]pk~-bgkP1yq5x x]?S-+)f1I8zM] ZWdj)X`[fQ 9mSk#H #-rn8a;{ +-]Nt`lQNf8J DE 0000015356 00000 n where live parts are exposed. 0000013411 00000 n 0000008553 00000 n Description: Current Transformer Cabinets Chapter/File Name: RPI-14 Date of Issue: 12/2006. 0000001925 00000 n We have received your request and will respond promptly. Newer Energy Efficient (EX Type) require .5" from rear and sides to any obstruction. %PDF-1.4 Refer to 094675 listed in the reference documents on Page 3 for the SmartPole metering options and requirements. Rule 2-312 "Transformer working space" was added to clarify that 1 m of clearance is required for transformers larger than 50kVA, but only on the side requiring access to conductor connections. The vehicle barrier system is relatively simple. 0000010177 00000 n >> << 0000107159 00000 n 0000094413 00000 n 0000009365 00000 n H\n@{b/ Yv"?p`"arJD8fdoC?tiqv~x|Lmtot]o{>Y>sMwyYm88nkSzx._{w~?3VuAL{u1Wvk8tJ>vj.^,:rN)%1r`A0o[^7/+asL{f,. 0000006663 00000 n 0000106169 00000 n Resolution:Older, non-EE Ventilated dry type Transformers must be installed so that a minimum of 6 inches clearance is available between a ventilation opening and any wall or other obstructions. AHJ's recommend that a system installer maintain the 5 foot separation wherever possible and only rely on the exceptions when absolutely necessary for a particular installation. The clearance requirement is clearly marked on the nameplate of the Transformer. A 96 long section of 5 rigid galvanized steel conduit, with cap, is then slid into the PVC sleeve. Please enter a valid email address /MediaBox [ 0 0 612 792 ] Electrical Service Requirements (ESR) Current as of October 28, 2022 The ESR Manual provides guidance and instructions pertaining to electrical service connections. On site inspection: The Department . (2) Subsurface horizontal transformer (see Table 5 and Table 6 on Page 6). The National Electrical Code (NEC) covers the minimum requirements of the installation of electrical wiring and equipment within public or private buildings and their premises. ]]> Tasks such as troubleshooting and testing may require work in areas . 0000010040 00000 n The only working space required is 110.26. This required clearance includes landscaping. 0000051290 00000 n There are generally no live parts in a transformer that are accessed for maintenance. endstream endobj 69 0 obj <>stream endstream endobj startxref /Pages 167 0 R Rated for 320 amps (CL 320) or less of "continuous" current. Single-phase, 120/240 volt or 120/208 volt. I totally understand that. Look on the transformer for the required clearances, as these are manufacturer's instructions and you must comply with them. 064309 Box-Pad for Pad-Mounted Transformers (PDF, 130 KB) 076255 Underground Transformer Selection (PDF, 91 KB) Joint Trench Configuration and Occupancy Guide (PDF, 5.3 MB) . #3. 0000008013 00000 n A clearance of 2 feet is required from the transformer pad to walls, fences, etc., as depicted in this document. The team coordinated its efforts to create a comprehensive temporary traffic control manual that is California MUTCD compliant. Despite recommended minimum ground clearance levels starting at 12 feet, industry standards now lean toward 35 feet or higher. > 0000002286 00000 n Depending on design some may have different requirements than others - this be true for liquid filled as well as dry transformers. >window, door or open i ng max. 0000007608 00000 n  @pw'xNp` Ip Np?KZs%{>g$|5F9@@ADDFD@AFBFCEA"""%}a20 /Width 952 Here are some tips to identify high voltage power lines and safe clearance levels: First, look for any signs of wire crossings near your home. In this light, SCE undertakes an annual TMCR process to 0000050228 00000 n Entrance and Egress Requirements - 110.26 (C) (2) When the electrical room includes "large equipment," entrance and egress requirements begin to get very specific. xc```c``Ma`e`0d`@ ;& SV{g30%bde"G3{w[:\od>[$,Wg2tfQPy4U?O*qH8,jp&[5OZ5z1qV6F,G0v%Ri% N+UddX0q0090c`0`U. %L|+j(*p`Ia 4`3<8p135l~&l(0,L)=^1L] 8v03t60(5}8( P` #'CK (! endstream endobj 66 0 obj <> endobj 67 0 obj <> endobj 68 0 obj <>stream L```H`TN/l@ ca:7W4_XYu ]@p'(` $n Section 110 .34 sets minimum clear work space dimensions around transformers . 'N3LL?HnEg+H&a0f}RmuU mv"_7ml`#+)k,QjQV5B`tbZZgM9CMSsG|:-+qSo5N(z7)=#27 gjZCsDU 0000051113 00000 n 212 0 obj <>/Filter/FlateDecode/ID[<7E4C3C8C4D0DEA45BE763507A96BB63A><90DC396EF0C48244ADA9FC72F9056453>]/Index[184 47]/Info 183 0 R/Length 129/Prev 378786/Root 185 0 R/Size 231/Type/XRef/W[1 3 1]>>stream 0000050346 00000 n A series of bollards located around the transformer, spaced no greater than 54 on center, and located 36 away from transformer are required. This does not apply to bottom ventilation openings. Find answers now. Th 12kV - 277/480V XFMR Work Clearance Requirement - Electric power & transmission & distribution - Eng-Tips 230 0 obj <>stream 174 0 obj Clear Height in front of Panel >480V. % /ColorSpace /DeviceRGB SCE has published landscaping guidelines with proper clearance requirements which is available in the Aboveground Equipment . 0000022788 00000 n Copyright 1998-2023 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. *1(b). Re: Working Space around transformers. Note: Q. management section which addresses SCE's wildfire mitigation efforts that meet the TMCR threshold. If you are an active authorized contractor, you should have access to SCE's internal documents and updates. The successful operation of a transformer is pendent on proper installation as well as on proper design and manufacture. trailer <<90727278BB064AD7912F5DA1E3DCE39F>]/Prev 553974>> startxref 0 %%EOF 253 0 obj <>stream Electrical Code to determine the requirements and limitations of transformer installations. 0000046047 00000 n 184 0 obj <> endobj 0000105671 00000 n 4. The clearance requirement is clearly marked on the nameplate of the Transformers. First, a transformer must be installed with the front (doors) facing away from the building, with no balconies or overhangs above. The clearance may be reduced to 1 foot if the height of the wall does not exceed 2 feet and if the wall thickness does not exceed 1 foot (i.e., planter box). endobj The CPUC action also requires that design and installation of any above ground equipment shall comply with SCE's Distribution Manuals, Above-Ground Equipment Aesthetics Improvement Manual (AIM), land use laws and local ordinances; however, these ordinances cannot effectively or indirectly require undergrounding of such equipment. Where their use is required, Self-contained (not transformer-rated). The transformer must be accessible to line trucks (size and weight similar to a cement truck), for maintenance or replacement. Transformer instructions might have clearance requirements. Whatever the answer is, I would that it is defined by not the vendor but the standard it's built too. Product Safety Notice: QO Plug-On-Neutral Load Center. 132 0 obj <> endobj xref Locking hardware required to prevent unauthorized access. If you need access, please contact your procurement agent or Edison Representative. Gain actionable insights on installed equipment health to maximize uptime and boost performance. 0000047352 00000 n 0000050110 00000 n 0000051821 00000 n 0000009635 00000 n 0 /Linearized 1 0000049562 00000 n 73 0 obj <>/Filter/FlateDecode/ID[<7F6D7977FBC6B5A0F7706E26A3702BF1><34AF2EBB594E0547B75CA8BBCD52949E>]/Index[65 21]/Info 64 0 R/Length 59/Prev 48507/Root 66 0 R/Size 86/Type/XRef/W[1 2 1]>>stream >> 0000103215 00000 n xX. "EA@>d6/P l.`vWHa` D.| For loads that exceed 100 amps contact the local service planning office for alternate metering . endstream I have not seen the working space requirements in the NEC applied to transformers. {N63v?~14enK6nk$8]P`W.VOs65"f2_6e6b (M*r(gb[?^k,v>ZVfmnyi]4!31yY,Yf_RM1u$aS[M2G_WzYT+XT-q9o t3?e|6}dhzi8\*i>IMD~GA4BYJKQ[qQHy"My6}"0BO'Gu3h?t#U>SG}4.r Revised Cal. The enclosure should not touch the walls. Jul 25, 2003. As you read through this manual, please keep in mind that safety is everyone's business and it is up to each one of us to do our part in ensuring a safe work zone. Service Drop Height Requirements . # ducts transformer sizes space 75, 150, 300, 500 for 500, 750, 1000, 1500 4 pr!. Transformers should not be . stream Medium Voltage Distribution and Grid Automation, Product Documentation and Software Downloads, Panelboards / Switchboards and Switchgear, Controllers, Expansion Modules, Servers & HMIs, Power Metering and Energy Monitoring Systems, Power Quality and Power Factor Correction, Integrated Power and Control Solutions (IPaCS) Equipment, Low Voltage/Medium Voltage Prefab Substations, Pushbuttons, Switches, Pilot Lights, Control Stations and Joysticks, Data Center Security and Environmental Monitoring, Service Plans for Electrical Distribution. In front of the transformer doors the bollards are required to be removable. << Doorway construction requirements include: The type of door construction and its fire rating. 0000010584 00000 n Unit substation style Transformers require a minimum of 12 inches around the ventilation openings, and local codes may exceed that. "Large equipment" is defined as any equipment that has a rating of 1200 amps or more and measures over 6 feet wide. Section 4.10 Required Vegetation Clearances (PDF, 5.3 MB) Tree Planting Matrix Tables (PDF, 5.3 MB) . xref Fo@(>\a!_Y7 jK$]1Ib4yT C% D'#'I#$? 0000050464 00000 n 8765-E RULE 16 Sheet 4 SERVICE EXTENSIONS (Continued) 4C2 Issued by Date Filed Apr 30, 1998 Advice Ltr. All proposed grading requires a clearance review. Please enter a valid email address transformer (retrofitting) or replacement of the fluid only (retrofilling) . Clear Height in front of Panel <480V. 'P<`{k}Z1v2p|pJ3vdku K"fV!*yQQogDUPrXW`U\45NyuZ5uB&e@}r.?nyY_'oH:7[*VjsD5}i]8LS~?K-;{e9uQPruTtlxZ@\IoQ5c~EoDxsEcWQdmi=!$^S/ 7hu\1tF[$_ Y-mk[AK"25?7&A/"ZGX0sJ=4N|*+x@DFnD-b!iWAe(dQ N{dbWW(zmu\L2,V${@&Y=>)&4h~)_B;]XO.jRTngX!> iAMnR,mi#4T[>"MudWxGf- By joining you are opting in to receive e-mail. 0000012991 00000 n SCE's access to its ROW and facilities must be maintained 24/7 and cannot be encumbered in order to ensure SCE's access for system operations, maintenance, and emergency response. 0000091825 00000 n [CDATA[// >