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Eaton typ CH är typiskt bland moderna brytare i den multipole gemensamma tripping utförs av en inre mekanism, inte av handtaget slips. Detta noteras i Eaton-katalogen i specifikationen av typ CH-brytaren (sidan V1-T1-31 i Eaton-katalogen, betoning av min):
Product Description
Quick-make, quick-break switch mechanism combined with inverse time element tripping operation and trip-free handle design. Type CH circuit breakers trip to the OFF position, eliminating nuisance callbacks. The CHF family also includes a trip flag to differentiate between a trip and the breaker being turned off. The thermal-magnetic trip curve avoids nuisance tripping on mild overloads while reacting almost instantaneously to severe short-circuit conditions. Multipole breakers have internal common trip connection to operate all poles simultaneously. Handles are marked with ON-OFF indication and ampere rating of the breaker.
och i fotnot 2 på tillbehörstabellen (sid. V1-T1-38):
Handle ties: typically used to join two similar independent single-pole breakers to form a two-pole noncommon trip breaker.
Det betyder att kombinationen av 2-poliga CH-brytare och ett handtagsslips endast kan användas för 240V-eller 120V-kretsar enligt NEC 240.15 (B) (1) och 240.15 (B) (2):
(B) Circuit Breaker as Overcurrent Device. Circuit
breakers shall open all ungrounded conductors of the circuit
both manually and automatically unless otherwise permitted in 240.15(B)(1), (B)(2), (B)(3), and (B)(4).
(1) Multiwire Branch Circuits. Individual single-pole circuit breakers, with identified handle ties, shall be permitted
as the protection for each ungrounded conductor of multi-wire branch circuits that serve only single-phase line-to-neutral loads.
(2) Grounded Single-Phase Alternating-Current Circuits. In grounded systems, individual single-pole circuit
breakers rated 120/240 volts ac, with identified handle ties,
shall be permitted as the protection for each ungrounded
conductor for line-to-line connected loads for single-phase
circuits.
När det gäller brytaren, har CH-linjen också täckt. Alla standard (CHF, CHT, CH-HID, CHP, CH-M50, CH-HM och CHP-HM brytare är märkta 120 / 240VAC, så de är listade för handtagsbunden service på 240VAC endast delade faskretsar.
I UL-kretsbrytarens märkningshandbok anges i punkt 40 att
An external handle tie alone does not
qualify as a common trip mechanism — a breaker of this type is marked to indicate it is an
independent trip breaker.