Neutral disconnect link
- Thread starter Tainted
- Start date
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230.75 simply states "in the service equipment". The larger switches I've seen (bolt-lok) had a link. On smallerr switches it appears this wording is relied upon "A terminal or bus to which all grounded conductors can be attached by means of pressure connectors shall be permitted for this purpose."
So are neutral disconnect links required in all service switches?
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Per UL they are. If the equipment is "Suitable for Use as Service Entrance' the link is removable, if it is just "Service Entrance" the link can be fixed in place.
Reason I ask is because in NYC electrical code 408.60 it says this:
(A) Neutral Disconnect Link in Service Switchboards
A bus link shall be provided for disconnecting the neutral service conductor(s) from the outgoing load neutral conductor(s). Such disconnect link shall be readily accessible and located downstream of the main bonding jumper and grounding electrode conductor terminal. In a multi-section switchboard a single neutral disconnect link may be provided for all service disconnects.
Exception: A single cable lug accommodating a maximum of two cables may be used in lieu of a neutral disconnect link for service disconnects 800 amperes or less.
But it doesn't tell you anything about service disconnects
- Location
- New Jersey
- Occupation
- Journeyman Electrician
That's is a confusing section because it applies to only switchboards but then goes on to mention service disconnects 800 amps or less.
So maybe they are classifying that service switchboards are service disconnects? Facepalm to whoever wrote these NYC codes....
- Location
- New Jersey
- Occupation
- Journeyman Electrician
I agree it's terrible. Are there many 800 amp or less service switchboards?
MyCleveland
Senior Member
- Location
- Cleveland, Ohio
Jim
Can you expand out on what the differences are based on definition from UL?
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
'Suitable for Use as' means the equipment may or may not be used for service entrance. The neutral-ground bond is removable/installable Common equipment includes fusible switch
'Suitable for use Only as' may only be used as service equipment. The neutral-ground bond is factory installed and fixed. Common equipment includes combo metering.
'Suitable for use Only as' may only be used as service equipment. The neutral-ground bond is factory installed and fixed. Common equipment includes combo metering.
MyCleveland
Senior Member
- Location
- Cleveland, Ohio
Thank You....adding in "Only" in the phrase cleared it up.
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