Iowa Electrical Examining Board

Latest NEC Changes

The following list of changes from the 2005 to the 2008 National Electrical Code is not inclusive, but does include those felt to have the most impact on electrical installations in the State of Iowa. Please refer to the particular article for the complete text. A complete list of changes is available through commercial vendors of code information.

  • Article 100 – New definitions for bonding, grounding, kitchen, neutral, etc.

  • 110.20 – Table 430.91 covering enclosure types has been moved to 110.20.

  • 110.22 – Equipment containing circuit breakers of fuses applied in engineered series combination ratings in accordance with 240.86(A) shall be field marked.

  • 110.26(C)(2) – Equipment size and rating determine necessity for two entrances.

  • 110.26(C)(3) – Access doors within 25 feet of equipment rated 1200 amp or more must open outward with simple pressure.

  • 210.4(B) – Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect all ungrounded conductors at the point where the branch circuit originates.

  • 210.4(D) – Multiwire branch circuits must be grouped together with their associated grounded (neutral) conductor at the branch circuit panelboard unless the grouping is obvious.

  • 210.8(A) – The exceptions to GFCI protection for appliances in dedicated spaces or receptacles not readily accessible have been eliminated. Note: This change has been amended out of the 2008 NEC by the Iowa Electrical Examining Board.

  • 210.8(B) – All outdoor receptacles in other than dwelling units must be GFCI protected.

  • 210.12(B) –All receptacles in the habitable portion of a dwelling unit, except for kitchens and baths, shall be protected by a listed AFCI, combination-type

  • 210.52 – Switched receptacles do not count as the receptacle outlets required by 210.52.

  • 210.52(E) – A receptacle outlet is required on dwelling unit balconies, decks or porches.

  • 210.62 – Show window receptacles must be installed within 18 inches above the window.

  • 240.24(F) – Overcurrent devices are not allowed to be located over steps.

  • 250.32(B) – Equipment grounding conductors are required to be installed with all branch circuits and feeders supplying separate buildings or structures.

  • 250.94 – An intersystem bonding termination must be installed on or near the service equipment.

  • 250.146 – Clarifies the rules for connection of equipment grounding conductor between receptacle and metal box.

  • 250.146(A) – Clarifies the types of boxes and cover combination that provide adequate grounding and bonding continuity.

  • 300.4(E) – Cables and raceways require protection where installed less than 1.5 inches below metal roof decking.

  • 300.5(B) – The interior of enclosures and raceways installed underground are considered wet locations.

  • 300.5(C) – Underground cables installed under buildings shall be in a raceway.

  • 300.9 – Conductors and cables installed in abovegrade raceways in wet locations shall be suitable for wet locations.

  • 310.15(B)(2)(c) – Raceways and cables installed on rooftops are subject to correction factors in Table 310.15(B)(2)(c).

  • 3145.16(B)(4) – Large devices require double conductor volume allowances.

  • 314.30(C) – Conductors and splices in handhole enclosures are required to be listed for wet locations.

  • 334.12(B)(4) – NM cable is not permitted in damp or wet locations.

  • 334.15(C) – NM cable installed in crawl spaces require the same protection as that installed in unfinished basements.

  • 334.80 – If two or more NM cables are installed in bored holes through wood framing that requires draft or fire stopping, their ampacity must be adjusted in accordance with Table 310.15(B)(2)(a).

  • 352.10(G) - The new foam core PVC is allowed in underground or concrete encased installations only.

  • 353.48 – Type HDPE conduit shall be joined together with approved fittings. PVC glue is not permitted.

  • 406.8 – Receptacles installed in damp or wet locations shall be listed as weather resistant.

  • 406.11 – 125 volt, 15 and 20 ampere receptacles required in 210.52 are to be tamper resistant.

  • 408.3(F) – Switchboards and panelboards containing high-leg systems are required to be field marked on the outside of the enclosure.

  • 408.36 – The general limit of 42 overcurrent devices in a panelboard has been relaxed.

  • 410.6 – All luminaires and lampholders are required to be listed.

  • 410.16 – Some surface-mounted fluorescent or LED luminaires have been identified as suitable for installation within the storage area.

  • 422.52 – Electric drinking water fountains must be GFCI protected.

  • 680.22 – The 5-foot and 10-foot dimensions for receptacle distance from pools and hot tubs has been changed to 6-foot.

  • 680.22(B) – Cord connected and hard wired pool pumps must be GFCI protected.

  • 680.26 – The requirements for the equipotential bonding of pools have been rewritten.

  • 680.26(C) – Pool water is required to be bonded to the equipotential grid.

  • 680.71 – A hydromassage tub must be supplied by an individual branch circuit.

  • 690.31(F) – Flexible, fine-stranded cables shall be terminated only with terminals, lugs or connectors that are identified and listed for such use.

  • 760 – This article has been rewritten.